Add mmanifest for repo

Signed-off-by: Nick Slowinski <nick@nick-slowinski.de>

manifest.json

@@ -0,0 +1,9 @@
+{
+	"id": "5202f467-d7f5-4322-850b-eeace37dd9ad",
+	"authors": ["nick-slowinski.de", "Nick Slowinski"],
+	"origin": "https://forge.nick-slowinski.de/nick-slowinski.de/amp-templates.git",
+	"url": "https://forge.nick-slowinski.de/nick-slowinski.de/amp-templates",
+	"imagefile": "",
+	"prefix": "ns-",
+	"repotype": "AppTemplates"
+}