docs: populate wiki (17 pages) - Home + _Sidebar + _Footer - Getting Started: Installation, First-script - Client APIs: SteamClient, CDNClient, WebAuth, WebAPI, SteamAuthenticator, SteamID, Master-Server-Queries - Advanced: Regenerating-Protobufs, Type-Checking, Contributing - Reference: Fork-Changes, FAQ Every page cross-linked, code examples pulled from live source, sidebar-navigable. Signatures match steam/ current implementations.