Move "enhanced tiling" into Keyboard settings

[Joe-xenotropic]

Starting in 23.10, Ubuntu introduced "enhanced tiling", which modifies the default behavior for Super+Right so that it does not only moves the window over to one side, but it also brings up a task-switcher for the remaining space.

I wanted to turn this off, but did not know what it was called or what program/library etc. was causing it. It was a change to the behavior of a keyboard shortcut, so I went to "keyboard shortcuts". There it still says Super+Right is "view split on right". This not accurate anymore, as that is only half of what Super+Right does with Enhanced Tiling on.

I had to do like 15 different Google searches before finding this Ask Ubuntu question

https://askubuntu.com/questions/1494628/how-can-i-disable-the-new-superarrow-window-screen-aligning-feature

which finally relieved my confusion, told me the name of the behavior, and allowed me to turn it off in the unexpected "Ubuntu Desktop" location.

Please somehow make it clear from the keyboard settings that "enhanced tiling" exists, since it does modify keyboard behavior to be other than what keyboard settings says it is. You could do this by:

- having "View Split On Left" and "Enhanced Tiling To Left" be two separate actions, and Super+left/right could be assigned to one or the other
- somehow indicate the existence of Enhanced Tiling in the description of the keyboard action, like "View Split on left (see also Enhanced Tiling)" would have at least let me know I needed to search for an "Enhanced Tiling" setting

See also related bug I filed for documenting Enhanced Tiling as part of keyboard shortcuts in ubuntu-docs https://bugs.launchpad.net/ubuntu/+source/ubuntu-docs/+bug/2054478