build: update to TypeScript 4.8

Updates the repo to TypeScript 4.8 and resolves some of the breaking changes. I've only kept the schematics code backwards-compatible since the rest of the changes are to our own tooling.

Author: crisbeto

integration/ng-add-standalone/package.json

@@ -37,6 +37,6 @@
     "karma-coverage": "~2.0.3",
     "karma-jasmine": "~4.0.0",
     "karma-jasmine-html-reporter": "~1.7.0",
-    "typescript": "file:../../node_modules/typescript"
+    "typescript": "~4.7.2"
   }
 }