MD Editor: Started work on input interface

Created implementation for codemirror, yet to use it.

resources/js/global.d.ts

@@ -15,4 +15,6 @@ declare global {
         baseUrl: (path: string) => string;
         importVersioned: (module: string) => Promise<object>;
     }
-}
+}
+
+export type CodeModule = (typeof import('./code/index.mjs'));