Desktop: Rich Text Editor: Allow toggling bulleted and numbered lists from the command palette

[personalizedrefrigerator]

Summary

This pull request maps Joplin's list commands (textBulletedList and textNumberedList) to TinyMCE commands. This is related to #10218.

To fully fix #10218, it would be necessary to register keyboard shortcuts with TinyMCE for existing Joplin commands, similar to what is done for CodeMirror. It seems likely that this will require the TinyMCE shortcuts API — trying to handle these shortcuts in onKeyDown causes conflicts with the TinyMCE built-in shortcuts (see this branch for a broken implementation).

Testing plan

1. Open a note in the Rich Text Editor.
2. Select text.
3. Open the command palette and run textBulletedList.
4. Verify that the selected text has been converted to a bulleted list.
5. Repeat steps 3-4 for textNumberedList.

This has been tested successfully on Ubuntu 24.04.