Add messenger's recipe

Author: sroze

symfony/messenger/4.1/config/packages/messenger.yaml

@@ -0,0 +1,8 @@
+framework:
+    messenger:
+        routing:
+            # Route your messages to the senders...
+            # 'App\Message\YourMessage': messenger.default_sender
+
+        adapters:
+            default: "%env(MESSENGER_ADAPTER_DSN)%"

symfony/messenger/4.1/manifest.json

@@ -0,0 +1,8 @@
+{
+    "copy-from-recipe": {
+        "config/": "%CONFIG_DIR%/"
+    },
+    "env": {
+        "MESSENGER_ADAPTER_DSN": "amqp://guest:guest@localhost:5672/%2f/messages"
+    }
+}