feat: return guilds in READY event, dispatch MESSAGE_CREATE event

foxchat/src/model/guild.rs

@@ -1,12 +1,11 @@
 use serde::{Serialize, Deserialize};
 
-use super::{channel::PartialChannel, user::PartialUser};
+use super::channel::PartialChannel;
 
 #[derive(Serialize, Deserialize, Debug, Clone)]
 pub struct Guild {
     pub id: String,
     pub name: String,
-    pub owner: PartialUser,
-    pub default_channel: PartialChannel,
+    pub owner_ids: Vec<String>,
     pub channels: Option<Vec<PartialChannel>>,
 }