docs: mention prompts

Author: jbogarthyde

packages/angular/cli/commands/add.md

@@ -1,3 +1,5 @@
 Adds the npm package for a published library to your workspace, and configures your default
 app project to use that library, in whatever way is specified by the library's schematic.
 For example, adding `@angular/pwa` configures your project for PWA support.
+
+The default app project is the value of `defaultProject` in `angular.json`. 

packages/angular/cli/commands/new.json

@@ -1,7 +1,7 @@
 {
   "$schema": "http://json-schema.org/schema",
   "$id": "ng-cli://commands/new.json",
-  "description": "Creates a new workspace and a new default Angular app.",
+  "description": "Creates a new workspace and an initial Angular app.",
   "$longDescription": "./new.md",
 
   "$aliases": [ "n" ],

packages/angular/cli/commands/new.md

@@ -1,5 +1,10 @@
 Creates and initializes a new Angular app that is the default project for a new workspace.
 
-* The new workspace folder is given the specified project name. The new app is created at the top level of the workspace folder.
+Provides interactive prompts for optional configuration, such as adding routing support.
+All prompts can safely be allowed to default.
+
+* The new workspace folder is given the specified project name, and contains configuration files at the top level. 
+
+* The new app files are placed in the `src/` subfolder. A corresponding end-to-end test app is placed in the `e2e/` subfolder.
 
 * The new app's configuration appears in the `projects` section of the `angular.json` workspace configuration file, under its project name.