Add headless plugin definition

Summary: Support explicitly marking headless plugins as "headless"

Reviewed By: passy

Differential Revision: D35891387

fbshipit-source-id: 50b5acb3a7c52d7aedf32e271ebe6fc6d4fcef73

desktop/flipper-common/src/PluginDetails.tsx

@@ -30,6 +30,7 @@ export interface PluginDetails {
   };
   flipperSDKVersion?: string;
   pluginType?: PluginType;
+  headless?: boolean;
   supportedDevices?: SupportedDevice[];
   supportedApps?: SupportedApp[];
   publishedDocs?: {
@@ -179,6 +180,7 @@ function getPluginDetailsV2(packageJson: any): PluginDetails {
     supportedApps: packageJson?.supportedApps,
     engines: packageJson.engines,
     publishedDocs: packageJson.publishedDocs,
+    headless: packageJson.headless,
   };
 }