feat(repo): add repo unarchive and repo rename, and report archive and delete

repo unarchive restores an archived repository, and repo rename renames
one, moving the Git remote or the saved default repository that selected
it to the new name. The archived-repository hint now points to
tea repo unarchive.

repo archive asks "Archive alice/x? It becomes read-only." and warns
"! alice/x is already archived" without a request when there is nothing
to do. Archive, unarchive, rename and delete confirm with a ✓ line on a
terminal, and --json returns the repository.

Signed-off-by: bircni <bircni@icloud.com>

internal/app/app_test.go

@@ -505,10 +505,8 @@ const (
 	release list
 	release publish
 	release view
-	repo archive
 	repo clone
 	repo create
-	repo delete
 	repo edit
 	repo fork
 	repo migrate