Chore: Start annotations app (#113018)

* annotation legacy store with api server, read only

* Add a feature flag for annotations app

* implement list filters

* annotations are not addressable by ID for read operations

* fix registry apps test

* add ownership for an app

* disable linter

* typo, of course

* fix go workspace

* update workspace

* copy annotation app in dockerfile

* update workspace

---------

Co-authored-by: Tania B. <10127682+undef1nd@users.noreply.github.com>

pkg/services/featuremgmt/toggles_gen.json

@@ -2153,6 +2153,19 @@
         "requiresRestart": true
       }
     },
+    {
+      "metadata": {
+        "name": "kubernetesAnnotations",
+        "resourceVersion": "1761142826172",
+        "creationTimestamp": "2025-10-22T14:20:26Z"
+      },
+      "spec": {
+        "description": "Enables app platform API for annotations",
+        "stage": "experimental",
+        "codeowner": "@grafana/grafana-backend-services-squad",
+        "expression": "false"
+      }
+    },
     {
       "metadata": {
         "name": "kubernetesAuthZHandlerRedirect",