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>

.gitignore

@@ -0,0 +1,29 @@
+*.log
+.DS_Store
+.env
+.env.backup
+.env.production
+.phpactor.json
+.phpunit.result.cache
+/.fleet
+/.idea
+/.nova
+/.phpunit.cache
+/.vscode
+/.zed
+/auth.json
+/node_modules
+/public/build
+/public/hot
+/public/storage
+/storage/*.key
+/storage/pail
+/storage/framework/views/*
+!/storage/framework/views/.gitignore
+/vendor
+Homestead.json
+Homestead.yaml
+Thumbs.db
+
+# Native mobile apps — kept locally, not tracked in this repo
+/apps