✨(react) render Button as link

For a variety of reasons, such as accessibility or integration with
external react-router deps style we needed to be able to provide the
ability to render the Button component as link in order to be able
to provide link-specific attribute for rendering such as href.

.changeset/breezy-llamas-fail.md

@@ -0,0 +1,5 @@
+---
+"@openfun/cunningham-react": minor
+---
+
+render Button as link