refactor(@angular-devkit/schematics): add more description to ng generate

Author: santoshyadavdev

packages/schematics/angular/component/schema.json

@@ -24,7 +24,7 @@
     },
     "name": {
       "type": "string",
-      "description": "The name of the component.",
+      "description": "The name of the component. The CLI creates a folder with provided name and creates component files inside the folder. The component selector uses {prexix}-{componentname} format. For new Angular apps {prefix} value is app.",
       "$default": {
         "$source": "argv",
         "index": 0

packages/schematics/angular/service/schema.json

@@ -8,7 +8,7 @@
   "properties": {
     "name": {
       "type": "string",
-      "description": "The name of the service.",
+      "description": "The name of the service. The CLI creates a service and spec files, the files are generated inside src folder if path is not provided.",
       "$default": {
         "$source": "argv",
         "index": 0