Add proper logging, make commands modularized, add new commands and add event handler

sqlschema.txt

@@ -1,6 +1,7 @@
 CREATE TABLE IF NOT EXISTS auto_roles (
   guild_id BIGINT NOT NULL,
-  role_id BIGINT NOT NULL
+  role_id BIGINT NOT NULL,
+  enabled BOOLEAN NOT NULL
 );
 
 CREATE TABLE IF NOT EXISTS reaction_role (
@@ -21,3 +22,8 @@ CREATE TABLE IF NOT EXISTS admin_roles (
     role_id BIGINT NOT NULL
 );
 
+CREATE TABLE IF NOT EXISTS users (
+    guild_id BIGINT NOT NULL,
+    user_id BIGINT NOT NULL,
+    settings_get_messaged_about_errors BOOLEAN NOT NULL
+);