fix(pipeline): correct paths for pipeline & support default WebUI pipeline config extraction (#4051)

# Description of Changes

- **What was changed:**  
- Updated `.github/labeler-config-srvaroa.yml` to include
`app/core/src/main/resources/static/pipeline/defaultWebUIConfigs/**`
under the labeler paths.
- Removed `COPY pipeline /pipeline` from all three Dockerfiles to slim
down images.
- Added a new `PIPELINE_PATH` constant and `getPipelinePath()` method in
`InstallationPathConfig.java`.
- Implemented `GeneralUtils.extractPipeline()` to copy default pipeline
JSON configs (`OCR images.json`, `Prepare-pdfs-for-email.json`,
`split-rotate-auto-rename.json`) from classpath into the installation
directory.
- Invoked `GeneralUtils.extractPipeline()` during initial setup in
`InitialSetup.java`.
  - Updated `.gitignore` to treat `./pipeline/` as ignored.  

- **Why the change was made:**  
Ensures that default WebUI pipeline configurations are automatically
extracted at runtime rather than baked into the image, improving
flexibility and reducing image size.

---

## 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/devGuide/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/devGuide/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/devGuide/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/devGuide/DeveloperGuide.md#6-testing)
for more details.

---------

Co-authored-by: Anthony Stirling <77850077+Frooodle@users.noreply.github.com>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

app/core/src/main/java/stirling/software/SPDF/config/InitialSetup.java

@@ -35,6 +35,7 @@ public class InitialSetup {
         initEnableCSRFSecurity();
         initLegalUrls();
         initSetAppVersion();
+        GeneralUtils.extractPipeline();
     }
 
     public void initUUIDKey() throws IOException {

app/core/src/main/resources/static/pipeline/defaultWebUIConfigs/OCR images.json

@@ -0,0 +1,43 @@
+{
+  "name": "OCR images",
+  "pipeline": [
+    {
+      "operation": "/api/v1/convert/img/pdf",
+      "parameters": {
+        "fitOption": "fillPage",
+        "colorType": "color",
+        "autoRotate": true,
+        "fileInput": "automated"
+      }
+    },
+    {
+      "operation": "/api/v1/general/merge-pdfs",
+      "parameters": {
+        "sortType": "orderProvided",
+        "fileInput": "automated"
+      }
+    },
+    {
+      "operation": "/api/v1/misc/ocr-pdf",
+      "parameters": {
+        "languages": [
+          "eng"
+        ],
+        "sidecar": false,
+        "deskew": false,
+        "clean": false,
+        "cleanFinal": false,
+        "ocrType": "skip-text",
+        "ocrRenderType": "hocr",
+        "removeImagesAfter": false,
+        "fileInput": "automated"
+      }
+    }
+  ],
+  "_examples": {
+    "outputDir": "{outputFolder}/{folderName}",
+    "outputFileName": "{filename}-{pipelineName}-{date}-{time}"
+  },
+  "outputDir": "{outputFolder}",
+  "outputFileName": "{filename}"
+}

app/core/src/main/resources/static/pipeline/defaultWebUIConfigs/Prepare-pdfs-for-email.json

@@ -0,0 +1,39 @@
+{
+  "name": "Prepare-pdfs-for-email",
+  "pipeline": [
+    {
+      "operation": "/api/v1/misc/repair",
+      "parameters": {}
+    },
+    {
+      "operation": "/api/v1/security/sanitize-pdf",
+      "parameters": {
+        "removeJavaScript": true,
+        "removeEmbeddedFiles": false,
+        "removeMetadata": false,
+        "removeLinks": false,
+        "removeFonts": false
+      }
+    },
+    {
+      "operation": "/api/v1/misc/compress-pdf",
+      "parameters": {
+        "optimizeLevel": 2,
+        "expectedOutputSize": ""
+      }
+    },
+    {
+      "operation": "/api/v1/general/split-by-size-or-count",
+      "parameters": {
+        "splitType": 0,
+        "splitValue": "15MB"
+      }
+    }
+  ],
+  "_examples": {
+    "outputDir": "{outputFolder}/{folderName}",
+    "outputFileName": "{filename}-{pipelineName}-{date}-{time}"
+  },
+  "outputDir": "httpWebRequest",
+  "outputFileName": "{filename}"
+}

app/core/src/main/resources/static/pipeline/defaultWebUIConfigs/split-rotate-auto-rename.json

@@ -0,0 +1,34 @@
+{
+  "name": "split-rotate-auto-rename",
+  "pipeline": [
+    {
+      "operation": "/api/v1/general/split-pdf-by-sections",
+      "parameters": {
+        "horizontalDivisions": 2,
+        "verticalDivisions": 2,
+        "fileInput": "automated",
+        "merge": false
+      }
+    },
+    {
+      "operation": "/api/v1/general/rotate-pdf",
+      "parameters": {
+        "angle": 90,
+        "fileInput": "automated"
+      }
+    },
+    {
+      "operation": "/api/v1/misc/auto-rename",
+      "parameters": {
+        "useFirstTextAsFallback": false,
+        "fileInput": "automated"
+      }
+    }
+  ],
+  "_examples": {
+    "outputDir": "{outputFolder}/{folderName}",
+    "outputFileName": "{filename}-{pipelineName}-{date}-{time}"
+  },
+  "outputDir": "{outputFolder}",
+  "outputFileName": "{filename}"
+}