## Description
This PR updates the TPDB Markers plugin to use the newer `find_groups()` method instead of the deprecated `find_movies()` method. This change resolves the deprecation warning while maintaining the same functionality.
## Changes Made
- Replaced `stash.find_movies()` with `stash.find_groups()` in the `processMovie()` function
- Updated both instances where the method was used:
1. When checking for existing movies by URL
2. When searching for movies by title
## Testing
The functionality remains the same, but now uses the recommended API method. The plugin will continue to:
- Process TPDB markers
- Create and associate movies with scenes
- Handle all existing features without the deprecation warning
## Related Issue
Fixes deprecation warning.
