wip: expand docs and wiki structure

add wiki links to README and README_RU
fill Start here pages for setup, commands/plugins, and MsgContext
add wiki page-priority tracker and local wiki AGENTS rules

README_RU.md

@@ -10,6 +10,8 @@
 
 [English](README.md)
 
+[Wiki](https://git.nix13.pw/ScuroNeko/Laniakea/wiki)
+
 ---
 
 ## ✨ Возможности
@@ -243,6 +245,8 @@ func adminOnlyMiddleware(ctx *laniakea.MsgContext, db *MyDB) bool {
 ## 📚 Дополнительная информация
 [GoDoc Laniakea](https://pkg.go.dev/git.nix13.pw/scuroneko/laniakea)
 
+[Wiki](https://git.nix13.pw/ScuroNeko/Laniakea/wiki)
+
 [Telegram Bot API](https://core.telegram.org/bots/api)
 
     ✅ Создано с ❤️ scuroneko