Remove the use of NSEvent for lines movement API

[Bogdan-Belogurov]

Description

Remove the use of NSEvent for the lines movement API, we need to interact through the editor menu.

Related Issues

• ✨ Move selected lines up and down #259

Checklist

• 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

Screen.Recording.2025-06-08.at.09.04.02.mov

[thecoolwinter]

I was initially hesitant to merge this, as eventually I'd like to move in this direction more generally (removing the local monitor and using menu commands). I realized it's a good start in that direction either way so sorry for that delay.