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)
Logging types are now based on the BuilderContext's type instead of the
`@angular-devkit/core` type. This reduces the need to directly depend
on this package while also allowing the builder logging type to diverge
if needed. The two usages of the BaseException type which is a small
wrapper around Error have also been removed.
During the build initialization phase, many paths are converted back and forth between multiple normalized forms. These conversions involve potentially expensive string operations. The majority of the custom path `normalize` function from `@angular-devkit/core` usages have now been removed in favor of the Node.js builtin path functions. This change reduces the need to perform additional string manipulation where possible.
All Angular builders are now located within one subdirectory of the `src` directory. This organization provides better discovery of the builders and will allow builder specific code to be stored in a single area.
The virtualfs Host was only used for exist and directory checks during asset and file replacement option normalization within the browser and dev-server builders.
Remove the manually maintained schema.d.ts from the browser builder, and use
the Schema JSON file to generate it. This had a lot of repercussions around
the whole build-angular code base and the different interfaces that were
manually kept.
