feat: add support for GitHub style admonition syntax

src/content/posts/markdown-extended.md

@@ -63,4 +63,15 @@ This is a note with a custom title.
 :::note[MY CUSTOM TITLE]
 This is a note with a custom title.
 :::
+```
+
+> [!TIP]
+> [The GitHub syntax](https://github.com/orgs/community/discussions/16925) is also supported.
+
+```
+> [!NOTE]
+> The GitHub syntax is also supported.
+
+> [!TIP]
+> The GitHub syntax is also supported.
 ```