vim: Allow ctrl+[ as an alias for escape (#2741)

Also remove unneeded mappings in `g` and `z` modes

Release Notes:

- Adds `ctrl+[` as an alias for escape
([#538](https://github.com/zed-industries/community/issues/538)).
96abba2b7dConrad Irwin committed on 7/17/2023, 9:07:53 PM· committed by GitHubparents9f650df9e44de9
1 file changedLine totals unavailable