add a TODO explaining the plan

src/core/typed.ts

@@ -5,5 +5,7 @@ export function typed<T>(name: string, types: string, arg: T) : T {
   }
 
   console.log(`TYPED-FUNCTION: Creating function "${name}" with types ${types}`)
+
+  // TODO: here we can now turn the inputs into a real typed-function with a signature
   return arg
 }