feat: add app_api to shipped and default enabled apps

Signed-off-by: Andrey Borysenko <andrey18106x@gmail.com>

Author: andrey18106

core/shipped.json

@@ -2,6 +2,7 @@
   "shippedApps": [
     "activity",
     "admin_audit",
+    "app_api",
     "bruteforcesettings",
     "circles",
     "cloud_federation_api",
@@ -54,6 +55,7 @@
   ],
   "defaultEnabled": [
     "activity",
+    "app_api",
     "bruteforcesettings",
     "circles",
     "comments",