Leoparden/plugin license manager (#2002)

* adds leoparden/plugin-license-manager

* Remove aliases from manifest.json

---------

Co-authored-by: Martin Flogaus <flogaus@leoparden.net>

Author: rustymcfly

leoparden/plugin-license-manager/1.0/manifest.json

@@ -0,0 +1,9 @@
+{
+    "bundles": {
+        "Leoparden\\PluginLicenseManager\\PluginLicenseManager": ["all"]
+    },
+    "env": {
+        "#1": "Platform identifier reported to the hub's /lifecycle/{platform}/{extension} endpoint.",
+        "LEOPARDEN_LICENSE_PLATFORM": "shopware"
+    }
+}