Description

Added support for opening files by dragging and dropping them onto the editor area. Users can now:

• Drag files from Finder or other apps directly into CodeEdit
• Drop files onto a specific editor in a split layout to open them in that editor
• Drop files anywhere in the workspace to open them in the active editor

Implementation Details

• Added drag & drop handlers to both the workspace view and individual editor areas
• When dropping on a specific editor:
  • Opens the file in that editor
  • Makes that editor active/focused
  • Brings the window to front
• Uses NSApp.activate() to ensure proper window focus when dragging from other applications

Related Issues

• closes ✨ Dragging file into a new window should open it #1163

Checklist

• Dragging a file onto an empty editor
• Dragging a file onto an editor that already has files open
• Dragging multiple files at once
• Dragging files from Finder while CodeEdit is in the background
• Dragging files onto different editors in a split layout
• Dragging files onto the general workspace area
• I read and understood the contributing guide as well as the code of conduct
• The issues this PR addresses are related to each other
• My changes generate no new warnings
• My code builds and runs on my machine
• My changes are all related to the related issue above
• I documented my code

Screenshots