chore: improve editor configuration, pre-commit hooks, and VSCode settings (#3780)

# Description of Changes

- Added `charset = utf-8` and defined `indent_size = 2` for `*.css`,
`*.json`, `*.jsonc`, and `*.yml` in `.editorconfig` to ensure consistent
formatting across file types.
- Improved labeler rules in `.github/labeler-config-srvaroa.yml` by
expanding path coverage for labeling Java and CI-related files.
- Upgraded pre-commit hooks:  
  - `ruff` from `v0.11.11` to `v0.12.0`  
  - `gitleaks` from `v8.26.0` to `v8.27.2`  
- Updated `codespell` args to ignore new terms like `thirdParty`,
`tabEl`, `tabEls`.
- Enhanced `.vscode/settings.json` and `extensions.json`:  
- Added formatting rules for `json`, `jsonc`, `markdown`, `python`, and
`gradle` files.
  - Included additional extensions for Markdown and Gradle.  
  - Applied detailed HTML formatting preferences.

---

## Checklist

### General

- [x] I have read the [Contribution
Guidelines](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/CONTRIBUTING.md)
- [x] 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)
- [x] I have performed a self-review of my own code
- [x] 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.

---------

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

.pre-commit-config.yaml

@@ -1,6 +1,6 @@
 repos:
   - repo: https://github.com/astral-sh/ruff-pre-commit
-    rev: v0.11.11
+    rev: v0.12.0
     hooks:
       - id: ruff
         args:
@@ -16,13 +16,13 @@ repos:
     hooks:
       - id: codespell
         args:
-          - --ignore-words-list=
+          - --ignore-words-list=thirdParty,tabEl,tabEls
           - --skip="./.*,*.csv,*.json,*.ambr"
           - --quiet-level=2
         files: \.(html|css|js|py|md)$
         exclude: (.vscode|.devcontainer|stirling-pdf/src/main/resources|Dockerfile|.*/pdfjs.*|.*/thirdParty.*|bootstrap.*|.*\.min\..*|.*diff\.js)
   - repo: https://github.com/gitleaks/gitleaks
-    rev: v8.26.0
+    rev: v8.27.2
     hooks:
       - id: gitleaks
   - repo: https://github.com/pre-commit/pre-commit-hooks