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/2025-05-21-193745_create_channels/up.sql

@@ -0,0 +1,13 @@
+-- Your SQL goes here
+CREATE TABLE channels (
+    uuid uuid PRIMARY KEY NOT NULL,
+    guild_uuid uuid NOT NULL REFERENCES guilds(uuid) ON DELETE CASCADE,
+    name varchar(32) NOT NULL,
+    description varchar(500) NOT NULL
+);
+CREATE TABLE channel_permissions (
+    channel_uuid uuid NOT NULL REFERENCES channels(uuid) ON DELETE CASCADE,
+    role_uuid uuid NOT NULL REFERENCES roles(uuid) ON DELETE CASCADE,
+    permissions int8 NOT NULL DEFAULT 0,
+    PRIMARY KEY (channel_uuid, role_uuid)
+);