refactor!: migrate class-validator to zod (#26597)

mobile/openapi/lib/model/plugin_action_response_dto.dart

@@ -35,7 +35,7 @@ class PluginActionResponseDto {
   String pluginId;
 
   /// Action schema
-  Object? schema;
+  PluginJsonSchema? schema;
 
   /// Supported contexts
   List<PluginContextType> supportedContexts;
@@ -96,7 +96,7 @@ class PluginActionResponseDto {
         id: mapValueOfType<String>(json, r'id')!,
         methodName: mapValueOfType<String>(json, r'methodName')!,
         pluginId: mapValueOfType<String>(json, r'pluginId')!,
-        schema: mapValueOfType<Object>(json, r'schema'),
+        schema: PluginJsonSchema.fromJson(json[r'schema']),
         supportedContexts: PluginContextType.listFromJson(json[r'supportedContexts']),
         title: mapValueOfType<String>(json, r'title')!,
       );