* Use the release helpers instead of hand-rolled version checks and downloads
Legacy /opt/*_version.txt files move to ~/.<app> on the next update.
* homeassistant: use get_latest_github_release
Added explicit warnings and user confirmation prompts to install scripts that run external installers from third-party sources. Updated JSON metadata to remove warning notes about external sources, as the scripts now handle user notification and consent directly. This improves transparency and user safety during installation.