Use on first install of this plugin, when MO2 or xEdit is not yet detected, when starting a new modpack project, or when the user says 'set up', 'install', 'bootstrap', 'configure', or 'initialize' the BGS modding environment. Orchestrates: MO2 detection and control-plane install, MO2 visible launch, optional xEdit download from BB-84C/TES5Edit, optional bgs-translator/xtl PyPI install, dev-log and release-changelog initialization, and end-to-end semantic smoke verification.
