Dockerfile.claude and Dockerfile.codex move from the repo root into
bot_bottle/contrib/claude/Dockerfile and bot_bottle/contrib/codex/Dockerfile
respectively, so all per-provider assets live alongside the provider code.
Closes#215
Squashes the demo-build arc: initial GIF + scripts, refactor to drive
recording through real cli.py, theme/timing tweaks, and the switch to
prompt-driven probes.