feat: cycle command completions with Tab

TODO.md

@@ -1,10 +1,5 @@
-- [x] syntax highlighting for Honey (honeylang)
-    - honeylang treesitter project located at `/Users/valdemar/Developer/Personal/Languages/tree-sitter-honey`.
-- [x] bug: `x` cut action does not copy the hovered character if not in selection mode, though should always copy.
-- [x] make diff comments word wrap / line wrap by default
-- [x] currently, a review comment seems to be attached even if the user doesn't "save" or write the comment buffer (e.g. using `:w`). just closing it with escape still seems to write it to the db.
-    - comments should be discardable
-- [x] cycle previous commands and search text in command and search input when pressing arrows up/down or ctrl+j/k.
+- [x] command autocompletion via `tab` (multiple presses cycles candidates)
+- [ ] fix ruby linting for the vamp config file (see attached image)
 - [ ] diff view: GitHub code review integration after the local review UX is usable.
 	- publish local reviews explicitly: general PR comments, inline line/range comments, review summaries, approval, and requests for changes.
 	- preserve explicit PR identity and reviewed commit IDs; validate anchors against GitHub's PR diff and recheck the PR head before submission.