[Notifier] Add iSendPro bridge

Author: leblanc-simon

.github/versions.json

@@ -574,6 +574,9 @@
             "6.1",
             "6.2"
         ],
+        "symfony/isendpro-notifier": [
+            "6.3"
+        ],
         "symfony/kaz-info-teh-notifier": [
             "6.1",
             "6.2"

symfony/isendpro-notifier/6.3/manifest.json

@@ -0,0 +1,5 @@
+{
+    "env": {
+        "#1": "ISENDPRO_DSN=isendpro://ACCOUNT_KEY_ID@default?from=FROM&no_stop=NO_STOP&sandbox=SANDBOX"
+    }
+}