[Enhancement] show all changes

[lukepighetti]

Currently we can see git diff hunks and navigate to them with [g and [G

I would like to also have a split view picker similar to space-f and space-F to view these changes across a file or the workspace

My suggestion would be to bind space-g and space-G to this feature, where the text to search is the contents of the hunk collapsed to one line with leading, trailing, and multiple whitespace removed

Then I would suggest rebinding debug to space-e

[pascalkuthe]

Duplicate of #5362,

See for a first implementation altough I think it needs some design work to work well as a picker.
I would especially like to see the workspace version of this (which would also included unopened files)

[pascalkuthe]

I mistyped and forgot to link the PR. See #5472 for an initial implementation