Cleanup src folder for web and move ts code into src/app per angular convention (#3127)

apps/web/src/polyfills.ts

@@ -0,0 +1,15 @@
+import "core-js/stable";
+require("zone.js/dist/zone");
+
+if (process.env.NODE_ENV === "production") {
+  // Production
+} else {
+  // Development and test
+  Error["stackTraceLimit"] = Infinity;
+  require("zone.js/dist/long-stack-trace-zone");
+}
+
+// Other polyfills
+require("whatwg-fetch");
+require("webcrypto-shim");
+require("date-input-polyfill");