docs: update the guard blueprint docs

Author: Brocco

docs/documentation/generate/guard.md

@@ -4,10 +4,41 @@
 `ng generate guard [name]` generates a guard
 
 ## Options
-`--app` Specifies app name or index to use.
+<details>
+  <summary>app</summary>
+  <p>
+    `--app` (alias: `-a`) _default value: 1st app_
+  </p>
+  <p>
+    Specifies app name to use.
+  </p>
+</details>
 
-`--flat` Indicate if a dir is created.
+<details>
+  <summary>flat</summary>
+  <p>
+    `--flat`
+  </p>
+  <p>
+    Indicate if a dir is created.
+  </p>
+</details>
 
-`--module` (`-m`) Allows specification of the declaring module.
+<details>
+  <summary>module</summary>
+  <p>
+    `--module` (alias: `-m`)
+  </p>
+  <p>
+  </p>
+</details>
 
-`--spec` Specifies if a spec file is generated.
+<details>
+  <summary>spec</summary>
+  <p>
+    `--spec`
+  </p>
+  <p>
+    Specifies if a spec file is generated.
+  </p>
+</details>