LibJS: Consolidate error messages into ErrorTypes.h

Now, exceptions can be thrown with
interpreter.throw_exception<T>(ErrorType:TYPE, "format", "args",
"here").

Libraries/LibJS/Tests/Object.values.js

@@ -13,14 +13,14 @@ try {
         Object.values(null);
     }, {
         error: TypeError,
-        message: "ToObject on null or undefined.",
+        message: "ToObject on null or undefined",
     });
 
     assertThrowsError(() => {
         Object.values(undefined);
     }, {
         error: TypeError,
-        message: "ToObject on null or undefined.",
+        message: "ToObject on null or undefined",
     });
 
     let values = Object.values({ foo: 1, bar: 2, baz: 3 });