This is my stab at #7709
I realize the code is flawed. There's no test coverage, I'm using
`clone()` and there are probably better ways to hook into the events.
Also, I didn't know what context to use for the keybinding. But maybe
with some pointers from someone who actually know what they're doing, I
can get this shippable.
Release Notes:
- vim: Added ctrl-6 for
[alternate-file](https://vimhelp.org/editing.txt.html#CTRL-%5E) to
navigate back and forth between two buffers.
https://github.com/zed-industries/zed/assets/261929/2d10494e-5668-4988-b7b4-417c922d6c61
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Co-authored-by: Conrad Irwin <conrad.irwin@gmail.com>