Windows: install-autostart.bat (Startup folder shortcut),
uninstall-autostart.bat. Linux: install-service.sh (systemd unit),
uninstall-service.sh.
Both launchers now use python -m wled_controller.main so port is
read from config/env instead of being hardcoded to 8080.
Restructure release.yml into 4 jobs:
- create-release: shared Gitea release with download table
- build-windows: existing portable ZIP (unchanged)
- build-linux: new tarball with venv + run.sh launcher
- build-docker: push image to Gitea Container Registry
Add build-dist.sh as Linux equivalent of build-dist.ps1.
Docker tags: version + latest (stable only, no latest for alpha/beta/rc).
