Dart json_serializable: remove experimental generator (#10533)

Author: agilob

docs/generators.md

@@ -24,7 +24,7 @@ The following generators are available:
 * [dart](generators/dart.md)  
 * [dart-dio](generators/dart-dio.md)  
 * [dart-dio-next (experimental)](generators/dart-dio-next.md)  
-* [dart-jaguar](generators/dart-jaguar.md)  
+* [dart-jaguar (deprecated)](generators/dart-jaguar.md)  
 * [eiffel](generators/eiffel.md)  
 * [elixir](generators/elixir.md)  
 * [elm](generators/elm.md)  

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/DartJaguarClientCodegen.java

@@ -17,6 +17,8 @@
 package org.openapitools.codegen.languages;
 
 import org.openapitools.codegen.*;
+import org.openapitools.codegen.meta.GeneratorMetadata;
+import org.openapitools.codegen.meta.Stability;
 import org.openapitools.codegen.meta.features.*;
 import org.openapitools.codegen.utils.ModelUtils;
 
@@ -88,6 +90,10 @@ public DartJaguarClientCodegen() {
                 )
         );
 
+        generatorMetadata = GeneratorMetadata.newBuilder(generatorMetadata)
+                .stability(Stability.DEPRECATED)
+                .build();
+
         outputFolder = "generated-code/dart-jaguar";
         embeddedTemplateDir = templateDir = "dart-jaguar";