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>

.env.example

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+APP_NAME="Ladill POS"
+APP_ENV=production
+APP_KEY=
+APP_DEBUG=false
+APP_URL=https://pos.ladill.com
+
+PLATFORM_URL=https://ladill.com
+PLATFORM_DOMAIN=ladill.com
+AUTH_DOMAIN=auth.ladill.com
+ACCOUNT_DOMAIN=account.ladill.com
+POS_DOMAIN=pos.ladill.com
+
+DB_CONNECTION=mysql
+DB_HOST=127.0.0.1
+DB_PORT=3306
+DB_DATABASE=ladill_pos
+DB_USERNAME=ladill_pos
+DB_PASSWORD=
+
+PLATFORM_DB_HOST=127.0.0.1
+PLATFORM_DB_PORT=3306
+PLATFORM_DB_DATABASE=ladilldb
+PLATFORM_DB_USERNAME=ladill_pos
+PLATFORM_DB_PASSWORD=
+
+SESSION_DRIVER=database
+SESSION_LIFETIME=120
+SESSION_DOMAIN=.ladill.com
+
+LADILL_SSO_CLIENT_ID=
+LADILL_SSO_CLIENT_SECRET=
+
+BILLING_API_URL=https://ladill.com/api/billing
+BILLING_API_KEY_POS=
+
+PAY_API_URL=https://ladill.com/api/pay
+PAY_API_KEY_POS=
+
+IDENTITY_API_URL=https://ladill.com/api
+IDENTITY_API_KEY_POS=
+
+POS_DEFAULT_CURRENCY=GHS
+POS_MERCHANT_IMPORT_ENABLED=true
+
+CRM_API_URL=https://crm.ladill.com/api
+CRM_API_KEY_POS=
+
+MERCHANT_DB_HOST=127.0.0.1
+MERCHANT_DB_PORT=3306
+MERCHANT_DB_DATABASE=ladill_merchant
+MERCHANT_DB_USERNAME=ladill_pos
+MERCHANT_DB_PASSWORD=
+
+VITE_APP_NAME="${APP_NAME}"