Migrate all plugins to spec v2

Summary: All the plugins migrated to spec v2 to allow packaging/publishing them independently from Flipper releases.

Reviewed By: passy

Differential Revision: D22041384

fbshipit-source-id: 23bfaf724f771a57bd628b9ea1c4d37846534a93

desktop/plugins/network/package.json

@@ -3,7 +3,7 @@
   "name": "flipper-plugin-network",
   "id": "Network",
   "flipperBundlerEntry": "index.tsx",
-  "main": "dist/index.js",
+  "main": "dist/bundle.js",
   "title": "Network",
   "description": "Use the Network inspector to inspect outgoing network traffic in your apps.",
   "icon": "internet",
@@ -23,5 +23,8 @@
   },
   "devDependencies": {
     "@types/pako": "^1.0.1"
+  },
+  "scripts": {
+    "prepack": "../../pkg/bin/run bundle"
   }
 }