feat: use diesel-cli instead of hand writing tables

after reading the documentation, crazy right? I figured out i was making my life hard, this makes my life easy again

migrations/2025-05-21-193954_create_messages/down.sql

@@ -0,0 +1,2 @@
+-- This file should undo anything in `up.sql`
+DROP TABLE messages;

migrations/2025-05-21-193954_create_messages/up.sql

@@ -0,0 +1,7 @@
+-- Your SQL goes here
+CREATE TABLE messages (
+    uuid uuid PRIMARY KEY NOT NULL,
+    channel_uuid uuid NOT NULL REFERENCES channels(uuid) ON DELETE CASCADE,
+    user_uuid uuid NOT NULL REFERENCES users(uuid),
+    message varchar(4000) NOT NULL
+);