Add recipe for stripe/stripe-php 19.0 (#1890)

This recipe configures the Stripe PHP client with:
- Service definition for Stripe\StripeClient
- Autowiring support via service alias
- Environment variable configuration for STRIPE_SECRET_KEY

stripe/stripe-php/19.0/config/packages/stripe.yaml

@@ -0,0 +1,7 @@
+services:
+    stripe.client:
+        class: 'Stripe\StripeClient'
+        arguments:
+            - '%env(STRIPE_SECRET_KEY)%'
+
+    Stripe\StripeClient: '@stripe.client'

stripe/stripe-php/19.0/manifest.json

@@ -0,0 +1,8 @@
+{
+    "copy-from-recipe": {
+        "config/": "%CONFIG_DIR%/"
+    },
+    "env": {
+        "STRIPE_SECRET_KEY": "sk_test_***"
+    }
+}