docs: generate API reference for 2.10.0 (#13330)

www/apps/api-reference/specs/admin/paths/admin_feature-flags.yaml

@@ -0,0 +1,42 @@
+get:
+  operationId: GetFeatureFlags
+  summary: List Feature Flags
+  description: >-
+    Retrieve a list of feature flags. The feature flags can be filtered by
+    fields such as `id`. The feature flags can also be sorted or paginated.
+  x-authenticated: false
+  parameters: []
+  x-codeSamples:
+    - lang: Shell
+      label: cURL
+      source:
+        $ref: ../code_samples/Shell/admin_feature-flags/get.sh
+  tags:
+    - Feature Flags
+  responses:
+    '200':
+      description: OK
+      content:
+        application/json:
+          schema:
+            type: object
+            description: SUMMARY
+            required:
+              - feature_flags
+            properties:
+              feature_flags:
+                type: object
+                description: The list of feature flags.
+    '400':
+      $ref: ../components/responses/400_error.yaml
+    '401':
+      $ref: ../components/responses/unauthorized.yaml
+    '404':
+      $ref: ../components/responses/not_found_error.yaml
+    '409':
+      $ref: ../components/responses/invalid_state_error.yaml
+    '422':
+      $ref: ../components/responses/invalid_request_error.yaml
+    '500':
+      $ref: ../components/responses/500_error.yaml
+  x-since: 2.10.0