Add export, update API report

Signed-off-by: Johan Haals <johan.haals@gmail.com>

packages/core-plugin-api/api-report.md

@@ -258,6 +258,7 @@ export type BackstagePlugin<
   getId(): string;
   output(): PluginOutput[];
   getApis(): Iterable<AnyApiFactory>;
+  getFeatureFlags(): Iterable<PluginFeatureFlagConfig>;
   provide<T>(extension: Extension<T>): T;
   routes: Routes;
   externalRoutes: ExternalRoutes;
@@ -463,7 +464,7 @@ export type FeatureFlag = {
   pluginId: string;
 };
 
-// @public
+// @public @deprecated
 export type FeatureFlagOutput = {
   type: 'feature-flag';
   name: string;
@@ -682,14 +683,20 @@ export type PluginConfig<
   register?(hooks: PluginHooks): void;
   routes?: Routes;
   externalRoutes?: ExternalRoutes;
+  featureFlags?: PluginFeatureFlagConfig[];
 };
 
 // @public
+export type PluginFeatureFlagConfig = {
+  name: string;
+};
+
+// @public @deprecated
 export type PluginHooks = {
   featureFlags: FeatureFlagsHooks;
 };
 
-// @public
+// @public @deprecated
 export type PluginOutput = FeatureFlagOutput;
 
 // @public

packages/core-plugin-api/src/plugin/index.ts

@@ -25,4 +25,5 @@ export type {
   PluginConfig,
   PluginHooks,
   PluginOutput,
+  PluginFeatureFlagConfig,
 } from './types';

packages/core-plugin-api/src/plugin/types.ts

@@ -19,7 +19,7 @@ import { AnyApiFactory } from '../apis/system';
 
 /**
  * Replace with using {@link RouteRef}s.
- * @deprecated
+ * @deprecated will be removed
  * @public
  */
 export type FeatureFlagOutput = {