Update linux keybinds (#12822)

Release Notes:
- Add `ctrl-y` for Redo.
- Reorder bindings for copy/paste Fixes #11912
- Update `ctrl-b` to show hide left dock. This is the default behavior
in VSCode.


![image](https://github.com/zed-industries/zed/assets/22079654/e0cc6c0e-81df-443f-b77c-9a96370b6cb4)

### Or...

Release Notes:

- N/A
6c70a809ecInam Ul Haq committed on 6/13/2024, 2:38:27 PM· committed by GitHubparenta35947c
1 file changedLine totals unavailable