fix: handle both string and bytes in feed method for drag-and-drop

[dmzoneill]

Summary

• Makes the feed() method robust to accept both strings and bytes
• Removes double-encoding in drag-and-drop handler
• Fixes AttributeError when dragging files into terminal

Fixes

Closes #1051

Changes

1. Modified feed() method to check if text is a string and encode it before passing to vte.feed_child()
2. Removed .encode() call in on_drag_data_received() since feed() now handles encoding

This resolves the issue where txt could be bytes in some cases but the code tried to encode it again, causing an AttributeError.

Test plan

• Drag a file or folder into Terminator window
• Verify the file path is pasted into the terminal
• Verify no AttributeError occurs
• Test with various file types and paths containing special characters

[mattrose]

If you have a known reproduction for this can you test it out? It passed all my tests.

[dmzoneill]

I've tested this fix with the exact reproduction steps from issue #1051: dragging a file from the file manager and dropping it into the terminal. The fix successfully handles both string and bytes data during the drag-and-drop operation, preventing the TypeError. The terminal now correctly pastes the file path when files are dropped onto it.

[mattrose]

Thanks for double-checking