Option to Disable Image Overwriting During Re-Sync

[ashleyshaw]

• Is your feature request related to a problem? Please describe.
  The inability to disable automatic overwriting of custom images during re-sync is frustrating.

• Describe the solution you'd like
  Add a feature that lets users choose whether or not to overwrite custom images during synchronization with Wetu.

• Describe alternatives you've considered
  Re-uploading images manually each time, which is time-consuming.

• Additional context
  This would help users maintain their custom content while still using the plugin’s syncing capabilities.