fix: add __init__.py exports for kommunikation and system_notif plugins for discovery

app/plugins/builtins/kommunikation/__init__.py

@@ -0,0 +1,5 @@
+"""Kommunikation builtin plugin."""
+
+from app.plugins.builtins.kommunikation.plugin import KommunikationPlugin
+
+__all__ = ["KommunikationPlugin"]

app/plugins/builtins/system_notif/__init__.py

@@ -0,0 +1,5 @@
+"""System notification builtin plugin."""
+
+from app.plugins.builtins.system_notif.plugin import SystemNotifPlugin
+
+__all__ = ["SystemNotifPlugin"]