[feature]: use gitdiff + confirm conflict/changes

[bcp-dev-ops]

great plugin and new to goose.

one feature i love from avante for consideration-- using the gitdiff conflict resolution UI to "preview" incoming changes before permanently writing them. Would it be possible to add

Screenshot from avante demo video on their homepage who implements something similar. Wondering if this is fairly simple to implement given the recent gitdiff functionality added.

Thank you for all your work!

[NexohLab]

Upping this, I wish there was a way to review changes before they are all written into files...

[azorng]

the system for this is done the other way around: changes are done by goose and written to disk, then there is a chance to see a diff and revert if desired
reviewing before writing is a bit challenging as the cli does this directly and we don't have control over that

[orenherman]

i would really love to see this as well. even goose is the one writing to disk, i think having an "opt-out" approach fine as well (instead of accepting goose changes, reverting them). wdyt?