Split embed.go with build tags so builds work without data files
(embed_nodata.go provides empty fallbacks, embed_data.go embeds real
data when built with -tags embed_data). Add Woodpecker CI pipeline
(format/lint/build), release pipeline (goreleaser + Docker), Containerfile,
docker-compose.yml, and goreleaser config. Update Makefile with format/lint
targets and embed_data tag on build targets. Rename project from
terraria-item-tree to terraria-companion throughout. Fix all errcheck
lint warnings in fetcher.go and server.go.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Felipe M.
ccae4b601d