docs(@schematics/angular): add README and update description in schema

Create README for the package, and add missing description in some schema.

packages/schematics/angular/README.md

@@ -0,0 +1,33 @@
+# @schematics/angular
+
+This package contains a collection of [schematics](/packages/angular_devkit/schematics/README.md)
+for generating an Angular application.
+
+## Schematics
+
+Name | Description
+-----|-------------
+app-shell | Generates an app shell for running a server-side version of an app
+application | Generates a new basic app definition in the "projects" subfolder of the workspace
+class | Creates a new, generic class definition in the given or default project
+component | Creates a new, generic component definition in the given or default project
+directive | Creates a new, generic directive definition in the given or default project
+e2e | Generates a new, generic end-to-end test definition for the given or default project
+enum | Generates a new, generic enum definition for the given or default project
+guard | Generates a new, generic route guard definition in the given or default project
+interceptor | Creates a new, generic interceptor definition in the given or default project
+interface | Creates a new, generic interface definition in the given or default project
+library | Creates a new, generic library project in the current workspace
+module | Creates a new, generic NgModule definition in the given or default project
+ng-new | Creates a new project by combining the workspace and application schematics
+pipe | Creates a new, generic pipe definition in the given or default project
+resolver | Creates a new, generic resolver definition in the given or default project
+service | Creates a new, generic service definition in the given or default project
+service-worker | Pass this schematic to the "run" command to create a service worker
+universal | Pass this schematic to the "run" command to set up server-side rendering for an app
+web-worker | Creates a new, generic web worker definition in the given or default project
+workspace | Initializes an empty workspace and adds the necessary dependencies required by an Angular application
+
+## Disclaimer
+
+While the schematics when executed via the Angular CLI and their associated options are considered stable, the programmatic APIs are not considered officially supported and are not subject to the breaking change guarantees of SemVer.

packages/schematics/angular/class/schema.json

@@ -3,7 +3,7 @@
   "$id": "SchematicsAngularClass",
   "title": "Angular Class Options Schema",
   "type": "object",
-  "description": "Creates a new generic class definition in the given or default project.",
+  "description": "Creates a new, generic class definition in the given or default project.",
   "additionalProperties": false,
   "properties": {
     "name": {

packages/schematics/angular/component/schema.json

@@ -3,7 +3,7 @@
   "$id": "SchematicsAngularComponent",
   "title": "Angular Component Options Schema",
   "type": "object",
-  "description": "Creates a new generic component definition in the given or default project.",
+  "description": "Creates a new, generic component definition in the given or default project.",
   "additionalProperties": false,
   "properties": {
     "path": {

packages/schematics/angular/directive/schema.json

@@ -3,7 +3,7 @@
   "$id": "SchematicsAngularDirective",
   "title": "Angular Directive Options Schema",
   "type": "object",
-  "description": "Creates a new generic directive definition in the given or default project.",
+  "description": "Creates a new, generic directive definition in the given or default project.",
   "additionalProperties": false,
   "properties": {
     "name": {

packages/schematics/angular/interface/schema.json

@@ -4,7 +4,7 @@
   "title": "Angular Interface Options Schema",
   "type": "object",
   "additionalProperties": false,
-  "description": "Creates a new generic interface definition in the given or default project.",
+  "description": "Creates a new, generic interface definition in the given or default project.",
   "properties": {
     "name": {
       "type": "string",

packages/schematics/angular/library/schema.json

@@ -3,7 +3,7 @@
   "$id": "SchematicsLibrary",
   "title": "Library Options Schema",
   "type": "object",
-  "description": "Creates a new generic library project in the current workspace.",
+  "description": "Creates a new, generic library project in the current workspace.",
   "long-description": "./library-long.md",
   "additionalProperties": false,
   "properties": {

packages/schematics/angular/module/schema.json

@@ -4,7 +4,7 @@
   "title": "Angular Module Options Schema",
   "type": "object",
   "additionalProperties": false,
-  "description": "Creates a new generic NgModule definition in the given or default project.",
+  "description": "Creates a new, generic NgModule definition in the given or default project.",
   "properties": {
     "name": {
       "type": "string",

packages/schematics/angular/ng-new/schema.json

@@ -3,6 +3,7 @@
   "$id": "SchematicsAngularNgNew",
   "title": "Angular Ng New Options Schema",
   "type": "object",
+  "description": "Creates a new project by combining the workspace and application schematics.",
   "additionalProperties": false,
   "properties": {
     "directory": {

packages/schematics/angular/package.json

@@ -2,6 +2,7 @@
   "name": "@schematics/angular",
   "version": "0.0.0",
   "description": "Schematics specific to Angular",
+  "homepage": "https://github.com/angular/angular-cli",
   "keywords": [
     "blueprints",
     "code generation",

packages/schematics/angular/pipe/schema.json

@@ -4,7 +4,7 @@
   "title": "Angular Pipe Options Schema",
   "type": "object",
   "additionalProperties": false,
-  "description": "Creates a new generic pipe definition in the given or default project.",
+  "description": "Creates a new, generic pipe definition in the given or default project.",
   "properties": {
     "name": {
       "type": "string",

packages/schematics/angular/web-worker/schema.json

@@ -4,7 +4,7 @@
   "title": "Angular Web Worker Options Schema",
   "type": "object",
   "additionalProperties": false,
-  "description": "Creates a new generic web worker definition in the given or default project.",
+  "description": "Creates a new, generic web worker definition in the given or default project.",
   "properties": {
     "path": {
       "type": "string",

packages/schematics/angular/workspace/schema.json

@@ -2,6 +2,7 @@
   "$schema": "http://json-schema.org/draft-07/schema",
   "$id": "SchematicsAngularWorkspace",
   "title": "Angular Workspace Options Schema",
+  "description": "Initializes an empty workspace and adds the necessary dependencies required by an Angular application.",
   "type": "object",
   "additionalProperties": false,
   "properties": {