chore: add advanced PR auto-labeling configuration and workflow (#3767)

# Description of Changes

Please provide a summary of the changes, including:

- Added `.github/labeler-config-srvaroa.yml` to define a comprehensive
auto-labeling configuration for PRs based on title patterns and file
paths.
- Introduced a new GitHub Actions workflow
`.github/workflows/auto-labelerV2.yml` that uses the `srvaroa/labeler`
action to automatically label pull requests.
- Extended `.github/labels.yml` to include missing label definitions
required for the auto-labeling setup (e.g., `Bugfix`, `build`, `ci`,
`perf`, etc.).

---

## Checklist

### General

- [ ] I have read the [Contribution
Guidelines](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/CONTRIBUTING.md)
- [ ] I have read the [Stirling-PDF Developer
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/DeveloperGuide.md)
(if applicable)
- [ ] I have read the [How to add new languages to
Stirling-PDF](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/HowToAddNewLanguage.md)
(if applicable)
- [ ] I have performed a self-review of my own code
- [ ] My changes generate no new warnings

### Documentation

- [ ] I have updated relevant docs on [Stirling-PDF's doc
repo](https://github.com/Stirling-Tools/Stirling-Tools.github.io/blob/main/docs/)
(if functionality has heavily changed)
- [ ] I have read the section [Add New Translation
Tags](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/HowToAddNewLanguage.md#add-new-translation-tags)
(for new translation tags only)

### UI Changes (if applicable)

- [ ] Screenshots or videos demonstrating the UI changes are attached
(e.g., as comments or direct attachments in the PR)

### Testing (if applicable)

- [ ] I have tested my changes locally. Refer to the [Testing
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/DeveloperGuide.md#6-testing)
for more details.

.github/labeler-config-srvaroa.yml

@@ -0,0 +1,136 @@
+version: 1
+labels:
+
+  - label: "Bugfix"
+    title: '^fix:.*'
+
+  - label: "enhancement"
+    title: '^feat:.*'
+
+  - label: "build"
+    title: '^build:.*'
+
+  - label: "chore"
+    title: '^chore:.*'
+
+  - label: "ci"
+    title: '^ci:.*'
+
+  - label: "perf"
+    title: '^perf:.*'
+
+  - label: "refactor"
+    title: '^refactor:.*'
+
+  - label: "revert"
+    title: '^revert:.*'
+
+  - label: "style"
+    title: '^style:.*'
+
+  - label: 'API'
+    title: '.*openapi.*'
+
+  - label: 'Translation'
+    files:
+      - 'stirling-pdf/src/main/resources/messages_[a-zA-Z_]{2}_[a-zA-Z_]{2,7}.properties'
+      - 'scripts/ignore_translation.toml'
+      - 'stirling-pdf/src/main/resources/templates/fragments/languages.html'
+      - '.github/scripts/check_language_properties.py'
+
+  - label: 'Front End'
+    files:
+      - 'stirling-pdf/src/main/resources/templates/**/*'
+      - 'proprietary/src/main/resources/templates/**/*'
+      - 'stirling-pdf/src/main/resources/static/**/*'
+      - 'proprietary/src/main/resources/static/**/*'
+      - 'stirling-pdf/src/main/java/stirling/software/SPDF/controller/web/**/*'
+      - 'stirling-pdf/src/main/java/stirling/software/SPDF/UI/**/*'
+
+  - label: 'Java'
+    files:
+      - 'common/src/main/java/**/*.java'
+      - 'proprietary/src/main/java/**/*.java'
+      - 'stirling-pdf/src/main/java/**/*.java'
+
+  - label: 'Back End'
+    files:
+      - 'stirling-pdf/src/main/java/stirling/software/SPDF/config/**/*'
+      - 'stirling-pdf/src/main/java/stirling/software/SPDF/controller/**/*'
+      - 'stirling-pdf/src/main/resources/settings.yml.template'
+      - 'stirling-pdf/src/main/resources/application.properties'
+      - 'stirling-pdf/src/main/resources/banner.txt'
+      - 'scripts/png_to_webp.py'
+      - 'split_photos.py'
+
+  - label: 'Security'
+    files:
+      - 'proprietary/src/main/java/stirling/software/proprietary/security/**/*'
+      - 'scripts/download-security-jar.sh'
+      - '.github/workflows/dependency-review.yml'
+      - '.github/workflows/scorecards.yml'
+
+  - label: 'API'
+    files:
+      - 'stirling-pdf/src/main/java/stirling/software/SPDF/config/OpenApiConfig.java'
+      - 'stirling-pdf/src/main/java/stirling/software/SPDF/controller/web/MetricsController.java'
+      - 'stirling-pdf/src/main/java/stirling/software/SPDF/controller/api/**/*'
+      - 'stirling-pdf/src/main/java/stirling/software/SPDF/model/api/**/*'
+      - 'scripts/png_to_webp.py'
+      - 'split_photos.py'
+      - '.github/workflows/swagger.yml'
+
+  - label: 'Documentation'
+    files:
+      - '**/*.md'
+      - 'scripts/counter_translation.py'
+      - 'scripts/ignore_translation.toml'
+    title: '^docs:.*'
+
+  - label: 'Docker'
+    files:
+      - '.github/workflows/build.yml'
+      - '.github/workflows/push-docker.yml'
+      - 'Dockerfile'
+      - 'Dockerfile.fat'
+      - 'Dockerfile.ultra-lite'
+      - 'exampleYmlFiles/*.yml'
+      - 'scripts/download-security-jar.sh'
+      - 'scripts/init.sh'
+      - 'scripts/init-without-ocr.sh'
+      - 'scripts/installFonts.sh'
+      - 'test.sh'
+      - 'test2.sh'
+
+  - label: 'Devtools'
+    files:
+      - '.devcontainer/**/*'
+      - 'Dockerfile.dev'
+      - '.vscode/**/*'
+      - '.editorconfig'
+      - '.pre-commit-config'
+      - '.github/workflows/pre_commit.yml'
+      - 'HowToAddNewLanguage.md'
+
+  - label: 'Test'
+    files:
+      - 'common/src/test/**/*'
+      - 'proprietary/src/test/**/*'
+      - 'stirling-pdf/src/test/**/*'
+      - 'testing/**/*'
+      - '.github/workflows/scorecards.yml'
+
+  - label: 'Github'
+    files:
+      - '.github/**/*'
+
+  - label: 'Gradle'
+    files:
+      - 'gradle/**/*'
+      - 'gradlew'
+      - 'gradlew.bat'
+      - 'settings.gradle'
+      - 'build.gradle'
+      - 'common/build.gradle'
+      - 'proprietary/build.gradle'
+      - 'stirling-pdf/build.gradle'

.github/labels.yml

@@ -111,3 +111,30 @@
 - name: "Devtools"
   color: "FF9E1F"
   description: "Development tools"
+- name: "Bugfix"
+  color: "FF9E1F"
+  description: "Pull requests that fix bugs"
+- name: "Gradle"
+  color: "FF9E1F"
+  description: "Pull requests that update Gradle code"
+- name: "build"
+  color: "1E90FF"
+  description: "Changes that affect the build system or external dependencies"
+- name: "chore"
+  color: "FFD700"
+  description: "Routine tasks or maintenance that don't modify src or test files"
+- name: "ci"
+  color: "4682B4"
+  description: "Changes to CI configuration files and scripts"
+- name: "perf"
+  color: "FF69B4"
+  description: "Changes that improve performance"
+- name: "refactor"
+  color: "9932CC"
+  description: "Code changes that neither fix a bug nor add a feature"
+- name: "revert"
+  color: "DC143C"
+  description: "Reverts a previous commit"
+- name: "style"
+  color: "FFA500"
+  description: "Changes that do not affect the meaning of the code (formatting, etc.)"

.github/workflows/auto-labelerV2.yml

@@ -0,0 +1,35 @@
+name: "Auto Pull Request Labeler V2"
+on:
+  pull_request_target:
+    types: [opened, synchronize]
+
+permissions:
+  contents: read
+
+jobs:
+  labeler:
+    runs-on: ubuntu-latest
+    permissions:
+      pull-requests: write
+    steps:
+      - name: Harden Runner
+        uses: step-security/harden-runner@002fdce3c6a235733a90a27c80493a3241e56863 # v2.12.1
+        with:
+          egress-policy: audit
+
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+
+      - name: Setup GitHub App Bot
+        id: setup-bot
+        uses: ./.github/actions/setup-bot
+        with:
+          app-id: ${{ secrets.GH_APP_ID }}
+          private-key: ${{ secrets.GH_APP_PRIVATE_KEY }}
+
+      - uses: srvaroa/labeler@0a20eccb8c94a1ee0bed5f16859aece1c45c3e55 # v1.13.0
+        with:
+          config_path: .github/labeler-config-srvaroa.yml
+          use_local_config: false
+          fail_on_error: true
+        env:
+          GITHUB_TOKEN: "${{ steps.setup-bot.outputs.token }}"