Redesign the source control pannel

[tejasPhaveri]

Hey, I really love how efficent zed is with the ide and ai capabilities, my only reason for not having my whole team switching to it is the soruce control panel, in vscode/cursor we have a simple workflow where when ai is editing code, we stage and unstage changes we want to keep and commit. To my knowlage it doesnt seem as user friendly to do so in zed, i might be wrong but from what i saw when i tried it out. I would like this to be implemented, i could submit a pr to help move things forward, lets discuss.