Initial Ladill Hosting app with Gitea deploy pipeline.

Shared web hosting extracted from the platform monolith, with CI deploy
to /var/www/ladill-hosting matching Bird/Domains/Email.

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 *