Replaces the bare uvicorn command with a comprehensive dev launcher
script that provides: auto port selection if 8000 is taken, docker
compose isolation, clickable service links (dashboard, health, API
docs, Ollama), a status line showing version/git commit/inference
backend, smoke tests on startup, and a dev shell with the timmy CLI
wired to the running instance.
Fixes#385
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
