Updates for all angular.io links to the new angular.dev domain. Additionally, adjustment to new resources where the equivalent does not exist on the new site (e.g. Tour of Heroes tutorial)
This commit adds an option to the `CommonEngine` to enable performance profiling. When enabled, timings of a number of steps will be outputted in the server console.
Example:
```
********** Performance results **********
Retrieve SSG Page: 0.3ms
Render Page: 25.4ms
Inline Critical CSS: 2.3ms
*****************************************
```
To enable profiling set `enablePeformanceProfiler: true` in the `CommonEngine` options.
```ts
const commonEngine = new CommonEngine({
enablePeformanceProfiler: true
});
```
This removes the util function for express, instead the "CommonEngine" is called directly infuture before this package is final we might rename the "CommonEngine" to something else.
