[idea] Stash inbox

[zaknafeyn]

A sidebar view showing:

Stashes
|─ WIP on feat/login
| |─ 8 files
| |─ 2 staged
| |─ 1 untracked
| |─ Actions: Apply here / Move to worktree / Create branch / Delete
|── WIP on main
|─ git-smart-checkout: move WIP to hotfix/payment

For each stash:
Apply to current worktree
Apply to new worktree
Create branch from stash
Preview diff
Rename stash
Drop stash