feat(schematics): adding schematic for ng-add (#4678)

* feat(schematics): adding 'ng add'

* feat(schematics): clean up

package.json

@@ -22,8 +22,9 @@
     "disable-lint": "tslint \"**/*.ts\" -c tslint.json --fix --type-check -t prose -e \"node_modules/**\" -e \"dist/**\" -e \"temp/**\" -e \"scripts/docs/**\"",
     "flow.changelog": "conventional-changelog -i CHANGELOG.md -s -p angular",
     "flow.github-release": "conventional-github-releaser -p angular",
-    "build": "run-s build.modules build.sass build.es2015",
+    "build": "run-s build.modules build:schematics build.sass build.es2015",
     "build.watch": "node scripts/build-modules --watch",
+    "build:schematics": "node scripts/schematics/build",
     "build.modules": "node scripts/build-modules",
     "build.sass": "node-sass --recursive src --output dist --source-map true --source-map-contents sass",
     "build.es2015": "node ./scripts/es2015/bundle.es2015.js",
@@ -117,6 +118,7 @@
     "jasmine-core": "3.1.0",
     "jasmine-data-provider": "2.2.0",
     "jasmine-spec-reporter": "4.2.1",
+    "json": "9.0.6",
     "karma": "2.0.2",
     "karma-chrome-launcher": "^2.0.0",
     "karma-cli": "^1.0.1",

schematics/.gitignore

@@ -0,0 +1,18 @@
+# Outputs
+src/**/*.js
+src/**/*.js.map
+src/**/*.d.ts
+
+# IDEs
+.idea/
+jsconfig.json
+.vscode/
+
+# Misc
+node_modules/
+npm-debug.log*
+yarn-error.log*
+
+# Mac OSX Finder files.
+**/.DS_Store
+.DS_Store

schematics/.npmignore

@@ -0,0 +1,3 @@
+# Ignores TypeScript files, but keeps definitions.
+*.ts
+!*.d.ts

schematics/README.md

@@ -0,0 +1,21 @@
+### Testing
+
+To test locally, install `@angular-devkit/schematics-cli` globally and use the `schematics` command line tool. That tool acts the same as the `generate` command of the Angular CLI, but also has a debug mode.
+
+Check the documentation with
+```bash
+schematics --help
+```
+
+### Unit Testing
+
+`npm run test` will run the unit tests, using Jasmine as a runner and test framework.
+
+### Publishing
+
+To publish, simply do:
+
+```bash
+npm run build
+npm publish
+```