feat(migadu-webmail): init (catppuccin#523)

Author: uncenter

scripts/userstyles.yml

@@ -440,6 +440,15 @@ userstyles:
     readme:
       app-link: "https://office.com"
       current-maintainers: [*gitmuslim]
+  migadu-webmail:
+    name: Migadu Webmail
+    category: productivity
+    readme:
+      app-link: https://webmail.migadu.com/
+      usage: |+
+        > [!NOTE]
+        > Set Migadu Webmail's built-in theme to 'Migadu' for the optimal experience.
+      current-maintainers: [*uncenter]
   nitter:
     name: Nitter
     category: social