[TS] Escape keywords in typescript object names (#7137)

* Add Object to the list of reserved keywords.
* Properly escape keywords in type names.
* Properly escape keywords in enum names.
* Properly escape keywords in enum field names.

tests/tsconfig.json

@@ -14,7 +14,9 @@
   },
   "include": [
     "monster_test.ts",
+    "typescript_keywords.ts",
     "my-game/**/*.ts",
+    "typescript/**/*.ts",
     "optional_scalars/**/*.ts",
     "namespace_test/**/*.ts",
     "union_vector/**/*.ts"