初步集成消息通道，支持Telegram + Lark机器人

src-tauri/src/chat_channel/mod.rs

@@ -0,0 +1,10 @@
+pub mod backends;
+pub mod command_dispatcher;
+pub mod command_handlers;
+pub mod error;
+pub mod event_subscriber;
+pub mod manager;
+pub mod message_formatter;
+pub mod scheduler;
+pub mod traits;
+pub mod types;