Added sidebar-notice

Author: lazuee

discord/sidebar-notice/README.md

@@ -0,0 +1,9 @@
+## Sidebar Notice
+
+> Displays the notice bar within the sidebar instead of positioning it at the top of the base container.
+
+### Variables
+- `--notice-join` : sets the icon for joining server notice.
+- `--notice-welcome`: sets the icon for welcome notice.
+
+### Preview