This commits adds an optional migration to migration existing projects to use the vite and esbuild based application builder.
The migration can be opted-in when running `ng update @angular/cli --name=use-application-builder`
The `@schematics/angular` package now contains a defined set of package `exports` including a `utility` subpath export.
A wildcard export is also temporarily defined to support transition away from existing deep-import usage.
The `@schematics/angular/utility` subpath export will contain supported utility methods used by the first-party schematics
contained within the `@schematics/angular` package and can be considered public API that will follow SemVer stability constraints.
The first group of utilities introduced in this change are used to modify the `angular.json` workspace file
within the schematics and include the `updateWorkspace` rule and `readWorkspace`/`writeWorkspace` helpers.
Code related to decoding buffers into strings and parsing content into JSON can now be removed by using the
support provided directly from the Tree instance for the executing schematic.
