Add the initial foundation for Coda, a Go/Docker service that converts
FLAC albums to MP3 320 kbps CBR, triggered by Lidarr webhooks or manually
from the web UI.
- docs: requirements and architecture (SQLite persistence, media volume,
work window, manual FLAC search, env + web config)
- config: .env loader with env precedence
- web: embed/dev asset split, chi server, index template (DaisyUI + htmx)
- build: Makefile (setup/css/run/build/test/lint), Dockerfile (Tailwind
standalone CLI + DaisyUI, no Node), .env.example, ignore rules
- docs: AGENTS.md and README for the project
