fix: correct paths for python scripts and implement classpath extraction (#3984)

# Description of Changes

- **What was changed**  
- Relocated `png_to_webp.py` and `split_photos.py` from `scripts/` to
`app/core/src/main/resources/static/python/`.
- Updated `.github/labeler-config-srvaroa.yml` and
`.pre-commit-config.yaml` to include the new script directory in their
file-matching patterns.
- Added `GeneralUtils.extractScript(String scriptName)` to load Python
scripts from the classpath (`static/python/`), extract them into a
temporary directory at runtime, and return the filesystem path.

- **Why the change was made**  
- To fix the Internal Server Error caused by missing script files at
their old locations.
- Ensure the Python helper scripts are packaged inside the JAR/WAR and
reliably accessible when the application runs.
  - Only local installations were affected

---

## 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: Copilot <175728472+Copilot@users.noreply.github.com>

.pre-commit-config.yaml

@@ -6,10 +6,10 @@ repos:
         args:
           - --fix
           - --line-length=127
-        files: ^((\.github/scripts|scripts)/.+)?[^/]+\.py$
+        files: ^((\.github/scripts|scripts|app/core/src/main/resources/static/python)/.+)?[^/]+\.py$
         exclude: (split_photos.py)
       - id: ruff-format
-        files: ^((\.github/scripts|scripts)/.+)?[^/]+\.py$
+        files: ^((\.github/scripts|scripts|app/core/src/main/resources/static/python)/.+)?[^/]+\.py$
         exclude: (split_photos.py)
   - repo: https://github.com/codespell-project/codespell
     rev: v2.4.1