chore(doc): comment channel routes

src/routes/channels/channel_ack.rs

@@ -1,5 +1,9 @@
 use revolt_quark::{models::User, perms, Db, EmptyResponse, Permission, Ref, Result};
 
+/// # Acknowledge Message
+///
+/// Lets the server and all other clients know that we've seen this message id in this channel.
+#[openapi(tag = "Messaging")]
 #[put("/<target>/ack/<message>")]
 pub async fn req(db: &Db, user: User, target: Ref, message: Ref) -> Result<EmptyResponse> {
     let channel = target.as_channel(db).await?;