add scripts for managing sms on pinephone

sms/clear_sms

@@ -0,0 +1,8 @@
+#!/usr/bin/env python3
+from sms import get_sms
+from subprocess import call
+from os.path import basename
+
+for sms in get_sms():
+    print(sms)
+    call(["mmcli", "-m", "any", "--messaging-delete-sms", sms[0]])