typefix netscriptFunctions (see desc)

* Types for InternalFunction and ExternalFunction have been modified to actually typecheck ns functions against docs.
* Internal functions are required to use unknown for any params on the inner function.
* Return types for internal function inner-function must match the respective external function.
* Added new typecheck assertion function for asserting dynamic object types, to allow unknownifying params that were previously hardcoded objec structures.
* Because type assertion for parameter types and return types is enforced by InternalAPI, removed all duplicate type declarations on NetscriptFunction params and returns.

src/utils/helpers/checkEnum.ts

@@ -1,4 +1,4 @@
-// This works for both enums and regular objects.
+/** Verifies that a supplied value is a member of the provided object/enum. Works for enums as well as enum-like objects (const {} as const). */
 export function checkEnum<T extends Record<string, unknown>>(obj: T, value: unknown): value is T[keyof T] {
   return Object.values(obj).includes(value);
 }