MISC: Protect against reassigning certain globals (#972)

src/utils/Protections.ts

@@ -0,0 +1,9 @@
+// This file is imported for side effects only.
+/* Prevent inadvertantly redefining certain window properties,
+   which are known to cause unrecoverable game errors when redefined.
+   The player is able to redefine these properties as writable if desired. */
+Object.defineProperties(window, {
+  Number: { writable: false },
+  Object: { writable: false },
+  String: { writable: false },
+});