create stable command parser

bot/lib/parseCommandArgs.ts

@@ -0,0 +1,9 @@
+import { commandPrefix } from "..";
+
+/** Helper function to extract arguments from commands */
+export default function parseCommandArgs(input: string) {
+  const a = input.slice(commandPrefix.length);
+  const sliceLength = a.startsWith('use') ? 2 : 1;
+  const b = a.trim().split(' ').slice(sliceLength);
+  return b;
+};