Add an undo button to the git panel

[mikayla-maki]

Also prep infrastructure for pushing a commit

Release Notes:

• N/A

[github-actions]

Squawk Report

✅ 0 violations across 2 file(s)

---

crates/collab/migrations/20250210223746_add_branch_summary.sql

ALTER TABLE worktree_repositories
ADD COLUMN worktree_repositories VARCHAR NULL;

✅ Rule Violations (0)

No violations found.

---

crates/collab/migrations/20250212060936_add_worktree_branch_summary.sql

ALTER TABLE worktree_repositories ADD COLUMN branch_summary TEXT NULL;

✅ Rule Violations (0)

No violations found.

---

📚 More info on rules

⚡️ Powered by Squawk (0.26.0), a linter for PostgreSQL, focused on migrations