Added a setting for deletion behavior

[Rudtrack]

Added a user setting to control note deletion behavior.

• "Move to Trash" moves the note to system trash instead of permanently deleting it.
• "Delete Permanently" is the same behavior as currently implemented, completely deleting the file.
• Default is "Move to Trash"

Closes #16

[Rudtrack]

Would it be possible to review this soon @levirs565? Would love to get this into the plugin 😄

[levirs565]

Thank you for your work. Sorry for late response.