Add a new Docker image variant tagged as `launcher` that includes
picoclaw, picoclaw-launcher, and picoclaw-launcher-tui. The image
defaults to running picoclaw-launcher (web console) instead of gateway.
Original minimal single-binary image remains unchanged.
New files:
- docker/Dockerfile.goreleaser.launcher: goreleaser Docker with 3 binaries
Updated:
- .goreleaser.yaml: new dockers_v2 entry for launcher tag
Guoguo