Daynivo names for the files on the SD card and the command line tool

- daynivo-config.json, daynivo-authorized_keys and daynivo-network-reset
  on the boot partition; errors go to daynivo-config.error.txt.
- daynivo-kiosk-ctl, with voxip-kiosk-ctl as a symlink to it.
- The voxip-* names keep working, so existing SD cards and instructions
  stay valid; when both config files are present the Daynivo one is
  applied last.
- Internal names (services, /etc/voxip-kiosk, user voxip) are unchanged.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

bin/daynivo-kiosk-ctl

@@ -0,0 +1,9 @@
+#!/usr/bin/python3 -I
+# Installed to /usr/lib/voxip-kiosk/ by install.sh. -I: ignore PYTHON* env and user site-packages.
+import sys
+
+sys.path.insert(0, "/usr/lib/voxip-kiosk/python")
+
+from voxip_kiosk.ctl import main  # noqa: E402
+
+sys.exit(main())