move himalaya wrapper from skills/himalaya/ to scripts/

The himalaya skill is a third-party ClawhHub package — putting custom
scripts inside it risks conflicts on updates. The wrapper is local
customization, so it belongs in scripts/ alongside email_processor.

skills/calendar/scripts/cal_tool.py

@@ -65,7 +65,7 @@ def _sync_calendar():
         print("Warning: CalDAV sync failed (will retry on next heartbeat)")
 
 
-HIMALAYA_WRAPPER = Path(__file__).resolve().parent.parent.parent / "himalaya" / "scripts" / "himalaya.sh"
+HIMALAYA_WRAPPER = Path(__file__).resolve().parent.parent.parent.parent / "scripts" / "himalaya.sh"
 
 
 def _send_email(email_str, account=None):