Add support for extras, conditionally displaying commands in the help command, and start working on moderation commands

src/cli.rs

@@ -221,6 +221,15 @@ pub enum Commands {
             default_values = &["redis://127.0.0.1:6379"],
         )]
         redis_urls: Vec<String>,
+
+        /// The bot owner's ID, this user will be allowed to assign moderators.
+        #[arg(
+            long,
+            env = "PAYPHONE_OWNER_ID",
+            value_name = "ID",
+            default_value_t = 0
+        )]
+        bot_owner_id: u64,
     },
 
     /// Starts a documentation server for the project which serves `cargo doc` and refreshes on