Add Traditional Chinese wiki pages; add language-switch links; fix stale Windows-only CI mention
Reflect 3-platform installers (Linux/macOS as UI-only previews)
Remove duplicated/stale links: drop content now owned by User-Manual, fix dead README section references
Add Project Status, Features, User Manual pages; move detailed content out of README
Rewrite wiki: Home, Getting Started, Architecture, FAQ, Legal & Privacy