Add plugin "Set Performers From Tags"

[Torrafox]

This PR adds the "Set Performers From Tags" plugin, which automatically assigns performers to scenes and images based on their tags.

How It Works

• Iterates through all scenes and images.
• Matches performer names and aliases against scene/image tags.
• Updates scenes and images with matched performers if necessary.

Use Case

This plugin is useful for users who have tagged their media files with performer names but haven't manually assigned performers. It helps organize large libraries efficiently, ensuring that performers are properly linked without manual input.