Feature Request: Support to platform-webworker

[lacolaco]

Bug Report or Feature Request (mark with an x)

- [ ] bug report -> please search issues before submitting
- [x] feature request

Area

- [x] devkit
- [x] schematics

Desired functionality

Currently, build_angular and schematics/angular don't support to build the platform-webworker application.

Interface ideas:

Generate webworker app

$ ng generate webworker # generate each UI/Worker entrypoint file

Build webworker app

$ ng run myapp:webworker # build app for webworker

...
        "server": {
          "builder": "@angular-devkit/build-angular:webworker",
          "options": {
            "appMain": "src/main.app.ts",
            "workerMain": "src/main.worker.ts",
            "tsConfig": "src/tsconfig.app.json"
          },
          "configurations": {
            ...
          }
        }
...

Mention any other details that might be useful

[alexeagle]

This issue was moved to angular/angular-cli#12105