"init" command for flipper-pkg tool

Summary: Added command "init" to "flipper-pkg" which helps to quickly initialise Flipper desktop plugin.

Reviewed By: passy

Differential Revision: D21253819

fbshipit-source-id: 85a2fbde07ecb63737d180d2a7e5cc2846b4f533

desktop/static/package.json

@@ -9,8 +9,9 @@
     "expand-tilde": "^2.0.2",
     "fb-watchman": "^2.0.0",
     "fix-path": "^3.0.0",
-    "fs-extra": "^8.1.0",
     "flipper-pkg-lib": "0.39.0",
+    "fs-extra": "^8.1.0",
+    "ignore": "^5.1.4",
     "mem": "^6.0.0",
     "mkdirp": "^1.0.0",
     "p-filter": "^2.1.0",
@@ -19,7 +20,6 @@
     "uuid": "^7.0.1",
     "ws": "^7.2.3",
     "xdg-basedir": "^4.0.0",
-    "ignore": "^5.1.4",
     "yargs": "^15.3.1"
   }
 }