Use @angular/builder:jest for schematic

[GregOnNet]

Acceptance Criteria

• Executing @co-it/schematics:jest
  • uses the default project defined in angular.json
  • adds @angular-builders/jest to devDependencies
  • removes karma.config
  • removes test.ts
  • replaces karma-builder in angular.json with @angular-builders/jest:run
  • clears the karma related options in angular.json
  • sets "module": "commonjs" in tsconfig.spec.js
  • sets "types": ["jest"] in tsconfig.spec.js
  • adds a jest.config.js in the src/ directory of the respective project

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• Executing @co-it/schematics:jest --project my-project
  • uses the given project defined in angular.json
  • yields an error if the project does not exist.
  • configures jest in the given project