docs: update site description to better reflect native platform

Author: kdroidFilter

mkdocs.yml

@@ -1,5 +1,5 @@
 site_name: Nucleus
-site_description: Gradle plugin for packaging JVM desktop apps as native installers
+site_description: The native desktop platform for the JVM — deep OS integration (notifications, tray, launcher, decorated windows, scheduler, media control) plus packaging on macOS, Windows, and Linux
 site_url: https://nucleusframework.dev
 repo_url: https://github.com/kdroidFilter/Nucleus
 repo_name: kdroidFilter/Nucleus