Add File Type Filtering

[JavaBaz]

Currently, FaraXtractor moves all files from subdirectories to the destination folder. It would be useful to add an option to filter files by type/extension (e.g., only move .mp4 or .mkv video files). This would be especially helpful when the source directories contain other non-video files that the user may not want to move.
Suggested Solution:

• Add a dropdown or text field in the UI to allow the user to specify file extensions to be moved (e.g., .mp4, .mkv, etc.).
• Implement filtering logic in the FileMover class to only move files that match the specified extensions.