Add HeXi bot codebase: custom plugins, web frontends, tests

- hexi core: message handling, rate limiting, cooldown, plugin manager
- Custom plugins: BF stats, daily check-in, quotes, persona cards, etc.
- Community plugins vendored under hexi/plugins with local fixes
- Web admin frontends (learning-chat, persona-admin), unified hexi/web
- Tests for rate_limit/cooldown/memes/persona; poetry.lock

Co-Authored-By: Claude <noreply@anthropic.com>

hexi/web/tsconfig.tsbuildinfo

@@ -0,0 +1 @@
+{"root":["./src/app.tsx","./src/main.tsx","./src/router.tsx","./src/vite-env.d.ts","./src/api/client.ts","./src/auth/loginpage.tsx","./src/auth/auth.tsx","./src/layout/applayout.tsx","./src/pages/home/index.tsx","./src/pages/plugins/index.tsx","./src/pages/settings/index.tsx","./src/plugins/index.ts","./src/plugins/galgame_card/index.tsx","./src/plugins/helldivers/index.tsx","./src/plugins/learning_chat/index.tsx"],"version":"5.9.3"}