[build] yarn bundle:meta builds and uploads all packages

Some changes to our build infra to create a Meta bundle containing all packages. 
Needs corresponding changes in the internal upgrade commands

compiler/forget/package.json

@@ -9,6 +9,8 @@
     "url": "git+https://github.com/facebook/react-forget.git"
   },
   "scripts": {
+    "bundle:meta": "scripts/bundle-meta.sh",
+    "hash": "scripts/hash.sh",
     "start": "yarn workspace playground run start",
     "next": "yarn workspace playground run dev",
     "build": "yarn workspaces run build",

compiler/forget/packages/babel-plugin-react-forget/package.json

@@ -9,8 +9,6 @@
   ],
   "scripts": {
     "build": "rimraf dist && tsc",
-    "bundle:meta": "scripts/bundle-meta.sh",
-    "hash": "scripts/hash-dist.sh",
     "test": "yarn jest && yarn snap:build && yarn snap",
     "jest": "tsc && jest",
     "snap": "node ../snap/dist/main.js",

compiler/forget/packages/babel-plugin-react-forget/scripts/hash-dist.sh

@@ -1,6 +0,0 @@
-#!/usr/bin/env bash
-set -eo pipefail
-
-# Hashes JS files in the dist directory to create a cache-breaker
-
-find dist -name '*.js' | sort | xargs shasum | shasum | awk '{ print $1 }' > dist/HASH

compiler/forget/scripts/hash.sh

@@ -0,0 +1,6 @@
+#!/usr/bin/env bash
+set -eo pipefail
+
+# Hashes JS files in the provided directory to create a cache-breaker
+
+find $1 -name '*.js' | sort | xargs shasum | shasum | awk '{ print $1 }'