Use the single type representing plugins

Summary: Use interface PluginDetails everywhere where plugins are handled and removed PluginDefinition type which was effectively a subset of PluginDetails

Reviewed By: mweststrate

Differential Revision: D21927456

fbshipit-source-id: 434ebeef955b922cc11757e78fbba8dec05f1060

desktop/scripts/build-utils.ts

@@ -34,6 +34,9 @@ export function die(err: Error) {
 export async function generatePluginEntryPoints() {
   console.log('⚙️  Generating plugin entry points...');
   const plugins = await getSourcePlugins();
+  for (const plugin of plugins) {
+    plugin.isDefault = true;
+  }
   if (await fs.pathExists(defaultPluginsIndexDir)) {
     await fs.remove(defaultPluginsIndexDir);
   }