feat(client-protocol): 可以解析消息啦

* 为客户端重构奠定库基础
* 对外提供了比较方便的获取消息附件及提及的方法

client-protocol/deno.jsonc

@@ -1,6 +1,7 @@
 {
     "imports": {
         "socket.io-client": "npm:socket.io-client@4.8.1",
-        "lingchair-internal-shared": "../internal-shared/mod.ts"
+        "lingchair-internal-shared": "../internal-shared/mod.ts",
+        "marked": "npm:marked@16.3.0"
     }
 }