Plugin marketplace for flipper-server-core

Summary:
Implementation taken from:

https://www.internalfb.com/code/fbsource/[85c1fe5afee7]/xplat/sonar/desktop/flipper-ui-core/src/fb/pluginMarketplaceAPI.tsx

As with the previous diff, the marketplace API for flipper-server-core accesses the existing config in a different way and depends on FlipperServer, instead of User, to execute intern request as to obtain marketplace plugins.

Reviewed By: passy

Differential Revision: D37749775

fbshipit-source-id: 968ea3f7a412893f032e5a7a50ecf17c298e18ff

desktop/flipper-server-core/src/plugins/fb-stubs/pluginMarketplaceAPI.tsx

@@ -0,0 +1,24 @@
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @format
+ */
+
+import {FlipperServer, MarketplacePluginDetails} from 'flipper-common';
+
+export async function loadAvailablePlugins(
+  server: FlipperServer,
+  marketplaceURL: string,
+): Promise<MarketplacePluginDetails[]> {
+  try {
+    const response = await fetch(marketplaceURL);
+    const plugins = await response.json();
+    return plugins;
+  } catch (e) {
+    console.error('Failed while retrieving marketplace plugins', e);
+    return [];
+  }
+}