feat(scaffolder): promote formDecorators out of experimental (#34180)

* feat(scaffolder): promote formDecorators out of experimental

Signed-off-by: benjdlambert <ben@blam.sh>

* fix(scaffolder): parse form decorator input through the configured zod schema

Signed-off-by: benjdlambert <ben@blam.sh>

* refactor(scaffolder-backend): emit single formDecorators field on the parameter-schema response

Signed-off-by: benjdlambert <ben@blam.sh>

* feat(scaffolder): promote form decorator blueprints to public API

Signed-off-by: benjdlambert <ben@blam.sh>

---------

Signed-off-by: benjdlambert <ben@blam.sh>

plugins/scaffolder-react/report-alpha.api.md

@@ -128,7 +128,7 @@ export const Form: (
   props: PropsWithChildren<ScaffolderRJSFFormProps>,
 ) => JSX_2.Element;
 
-// @alpha
+// @public
 export const FormDecoratorBlueprint: ExtensionBlueprint<{
   kind: 'scaffolder-form-decorator';
   params: {
@@ -257,7 +257,7 @@ export interface ScaffolderFieldProps {
   required?: boolean;
 }
 
-// @alpha (undocumented)
+// @public (undocumented)
 export type ScaffolderFormDecorator<TInput extends JsonObject = JsonObject> = {
   readonly $$type: '@backstage/scaffolder/FormDecorator';
   readonly id: string;

plugins/scaffolder-react/src/next/blueprints/FormDecoratorBlueprint.tsx

@@ -25,7 +25,7 @@ const formDecoratorExtensionDataRef =
   });
 
 /**
- * @alpha
+ * @public
  * Creates extensions that are Field Extensions for the Scaffolder
  * */
 export const FormDecoratorBlueprint = createExtensionBlueprint({

plugins/scaffolder-react/src/next/extensions/createScaffolderFormDecorator.ts

@@ -33,7 +33,7 @@ export type ScaffolderFormDecoratorContext<
   ) => void;
 };
 
-/** @alpha */
+/** @public */
 export type ScaffolderFormDecorator<TInput extends JsonObject = JsonObject> = {
   readonly $$type: '@backstage/scaffolder/FormDecorator';
   readonly id: string;