Add resource definition to ogranization accout level (#84)

* Add context block to content configuration for Account resource in KCP manifest
* Remove null namespace from content configuration

---------

Co-authored-by: Grzegorz Krajniak <[email protected]>

Author: gkrajniak

manifests/kcp/01-platform-mesh-system/contentconfiguration-main-home.yaml

@@ -24,6 +24,15 @@ spec:
                 "defineEntity": {
                   "id": "main"
                 },
+                "context": {
+                  "resourceDefinition": {
+                    "group": "core.platform-mesh.io",
+                    "plural": "accounts",
+                    "singular": "account",
+                    "kind": "Account",
+                    "scope": "Cluster"
+                  },
+                },
                 "children": [
                   {
                     "pathSegment": "overview",