docs(angular): add downgrade module docs (#12495)

docs/generated/packages/angular.json

@@ -635,6 +635,7 @@
         },
         "additionalProperties": false,
         "required": ["name", "project"],
+        "examplesFile": "## Examples\n\nBelow are some examples of how to generate configuration and setup for using `ngUpgrade`'s `DowngradeModule` for your application.\n\n{% tabs %}\n\n{% tab label=\"Basic Usage\" %}\n\n```bash\nnx g @nrwl/angular:downgrade-module --name=myAngularJsModule --project=myapp\n```\n\n{% /tab %}\n\n{% tab label=\"Setup Router\" %}\n\nAllow a setup that configures routing for `DowngradeModule`.\n\n```bash\nnx g @nrwl/angular:downgrade-module --name=myAngularJsModule --project=myapp --router=true\n```\n\n{% /tab %}\n\n{% /tabs %}\n",
         "presets": []
       },
       "description": "Sets up a Downgrade Module.",

packages/angular/docs/downgrade-module-examples.md

@@ -0,0 +1,25 @@
+## Examples
+
+Below are some examples of how to generate configuration and setup for using `ngUpgrade`'s `DowngradeModule` for your application.
+
+{% tabs %}
+
+{% tab label="Basic Usage" %}
+
+```bash
+nx g @nrwl/angular:downgrade-module --name=myAngularJsModule --project=myapp
+```
+
+{% /tab %}
+
+{% tab label="Setup Router" %}
+
+Allow a setup that configures routing for `DowngradeModule`.
+
+```bash
+nx g @nrwl/angular:downgrade-module --name=myAngularJsModule --project=myapp --router=true
+```
+
+{% /tab %}
+
+{% /tabs %}

packages/angular/src/generators/downgrade-module/schema.json

@@ -34,5 +34,6 @@
     }
   },
   "additionalProperties": false,
-  "required": ["name", "project"]
+  "required": ["name", "project"],
+  "examplesFile": "../../../docs/downgrade-module-examples.md"
 }