Add Ladill POS v1 — register, Pay checkout, and commerce links.

Staff-facing counter register at pos.ladill.com with catalog cart, cash and
MoMo/card checkout via Ladill Pay, CRM timeline/import, invoice prefill, and
Merchant catalog import.

Co-authored-by: Cursor <cursoragent@cursor.com>

deploy/sudoers.ladill-hosting.example

@@ -0,0 +1,7 @@
+# Replace `www-data` with the actual PHP-FPM/web user that runs the app.
+# Install as `/etc/sudoers.d/ladill-hosting` with mode `0440`.
+#
+# These helpers are root-owned fixed entry points installed by the deploy script.
+
+www-data ALL=(root) NOPASSWD: /usr/local/bin/ladill-hosting-admin *
+www-data ALL=(root) NOPASSWD: /usr/local/bin/ladill-hosting-user *