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/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.)"