provide description in package.json

Also making sure that the README is being published.

Author: RobinMalfait

packages/@headlessui-react/package.json

@@ -1,11 +1,13 @@
 {
   "name": "@headlessui/react",
   "version": "0.3.2",
+  "description": "A set of completely unstyled, fully accessible UI components for React, designed to integrate beautifully with Tailwind CSS.",
   "main": "dist/index.js",
   "typings": "dist/index.d.ts",
   "module": "dist/headlessui.esm.js",
   "license": "MIT",
   "files": [
+    "README.md",
     "dist"
   ],
   "engines": {

packages/@headlessui-vue/package.json

@@ -1,11 +1,13 @@
 {
   "name": "@headlessui/vue",
   "version": "0.3.1",
+  "description": "A set of completely unstyled, fully accessible UI components for Vue 3, designed to integrate beautifully with Tailwind CSS.",
   "main": "dist/index.js",
   "typings": "dist/index.d.ts",
   "module": "dist/headlessui.esm.js",
   "license": "MIT",
   "files": [
+    "README.md",
     "dist"
   ],
   "engines": {