Play the challenges on a Mac station and tag v0.1.0 #8

Depends on: #5, #6, #7

Goal

hello-world, Vibe Coding Mad Libs, and BirdsBirdBirds pass the challenge spec's Ship checklist on a real station. An event config can then pin them.

Cloud workers can't do this. boothstrap dev needs macOS window control, the station needs a vault, and making the repo public is an org decision.

Scope

• Make MLH/microhackathon-challenges public. Stations fetch it from codeload with no credentials (boothstrap.sh's docs/challenge-packages.md), so a private repo fails as repo_fetch_failed.
• On a Mac, play each package with boothstrap dev challenges/<id> --install and check the spec's Ship checklist:
  • It completes end to end.
  • Leave, the idle timeout, and a kill-and-relaunch mid-challenge each leave nothing behind, including no preview server still listening.
  • The gallery publishes only after a yes (Birds).
  • show_preview tiles Chrome correctly (Mad Libs, Birds).
• Tag v0.1.0. Point an event config at https://github.com/MLH/microhackathon-challenges, ref v0.1.0, directories challenges/hello-world, challenges/vibe-coding-mad-libs, challenges/birdsbirdbirds (and challenges/glitch-invaders if feat: add the Glitch Invaders challenge #23 lands first). Provision the event vault's gemini service.
• File follow-ups for anything the playthrough finds, plus, in MLH/boothstrap.sh, the big-screen Birds display: a booth API endpoint that lists approved bird items, and a TV page for the birds-v1 renderer.

Acceptance

• The repo is public.
• Each challenge's Ship checklist is checked off in a comment here.
• v0.1.0 is tagged, and a station on that event config lists every configured challenge as available.
• The follow-up issues are filed.