minor #2480 [LiveComponent] Document make:twig-component (seb-jean)

This PR was merged into the 2.x branch.

Discussion
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[LiveComponent] Document `make:twig-component`

Second part for #480

Commits
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bab2d3a document make:twig-component

src/LiveComponent/doc/index.rst

@@ -176,6 +176,15 @@ fresh copy of our component. That HTML will replace the current HTML. In
 other words, you just generated a new random number! That's cool, but
 let's keep going because… things get cooler.
 
+.. tip::
+
+    If you use the `Symfony MakerBundle`_, you can easily create a new component
+    with the ``make:twig-component`` command:
+
+    .. code-block:: terminal
+
+        $ php bin/console make:twig-component --live EditPost
+
 .. tip::
 
     Need to do some extra data initialization on your component? Create