sync wiki from main repo
libtdjson: build from source on all platforms
remove api_id/api_hash from docs
sync wiki with v0.4.0 - Update Home: add tool system, GitHub integration, media - Update Installation: add full lazy config, libtdjson table, API creds - Update Configuration: full option table, env vars, proxy, database - Update Keymaps: match current keybindings (G, @, tools, commands)
add Installation, Configuration, Keymaps pages