Split package "flipper-pkg" into two: lib and cli

Summary: "flipper-pkg" added ~2MB to Flipper disttributive size, because of heavy dependencies which are only required for CLI functionality. See size warning in diff D21068373 in this stack where I added pkg as dependency to flipper. Here I'm splitting it into library and CLI packages, so Flipper app will only reference the library.

Reviewed By: passy

Differential Revision: D21087336

fbshipit-source-id: d9d62f1e75a835d1c0fa78ff1addb0d9a761a9c7

desktop/pkg/package.json

@@ -20,10 +20,8 @@
     "@types/node": "^13.7.5",
     "cli-ux": "^5.4.5",
     "fs-extra": "^8.1.0",
-    "flipper-babel-transformer": "0.37.0",
-    "inquirer": "^7.0.5",
-    "metro": "^0.59.0",
-    "tslib": "^1"
+    "flipper-pkg-lib": "0.37.0",
+    "inquirer": "^7.0.5"
   },
   "devDependencies": {
     "@oclif/dev-cli": "^1",