feat(tags): Implement AI-powered automatic file tagging

[cmeka]

I've implemented a feature that leverages local AI models to automatically tag files:

• Integrates with a local API service for AI-powered media tagging
• Files are processed in parallel with 4 concurrent API requests
• AI-generated tags are marked in the system to prevent duplicate processing and maintain distinction from user-created tags

The implementation connects to a local AI tagging service via API calls (configurable in Advanced settings).
I've created a supporting service https://github.com/cmeka/media-tag-service as I couldn't find an existing solution.

I'm a fan of this application and developed this feature to enhance its capabilities and reduce manual tagging work.
I'm open to any modifications or suggestions to better align with the project.
This is my first contribution to an Electron-based project, so any feedback is welcome.

Future considerations

• Allow the number of concurrent API requests to be configurable
• Add UI options to filter/manage/remove AI-created tags

[Antoine-lb]

Thanks for your work! I will try to review it more deeply this week