[Web] Add Mailcow\ class structure and imapsync module classes

data/web/inc/lib/composer.json

@@ -13,5 +13,10 @@
         "stevenmaguire/oauth2-keycloak": "^4.0",
         "league/oauth2-client": "^2.7",
         "bacon/bacon-qr-code": "^2.0"
+    },
+    "autoload": {
+        "psr-4": {
+            "Mailcow\\": "mailcow/"
+        }
     }
 }