Shortcodes: Add font-awesome shortcode

README.md

@@ -61,3 +61,11 @@ To create a new general blog post, run a command like this:
 ```shell
 hugo new content --king article blog/your-article-title.md
 ```
+
+### Icons
+
+You can use solid and brand icons from https://fontawesome.com/icons version 6 in your posts like this:
+```md
+{{< fa envelope >}}
+{{< fa brands gitlab >}}
+```