ng-toolkit

[imhoffd]

We should add @ionic/ng-toolkit as a separation layer between the third-party Angular CLI so that it can be versioned independently of the Ionic CLI.

This would let people keep the Ionic CLI up-to-date even if they needed an older version of the Angular CLI.

Tying the Angular CLI API to the Ionic CLI has already resulted in these issues:

• Cannot run in Cordova mode with V4 project using Angular CLI >6.0.0-rc.3 #3102
• fix(serve): remove progress cli flag #3064

[imhoffd]

https://github.com/ionic-team/ionic-cli/tree/master/packages/%40ionic/ng-toolkit in master now

[imhoffd]

The plan is to use ng-toolkit as a library much like @angular-devkit/build-angular: https://github.com/angular/devkit/tree/master/packages/angular_devkit/build_angular

We can pass in configuration unrelated to Angular build/serve logic via environment variables by using builder options passed in via command line.

cc @stupidawesome

[imhoffd]

📝 RC.7 will need updated starters to include the ng-toolkit

[imhoffd]

In RC.8