Fix #4981: ruffle broken :(

* Switch to the official Ruffle NPM package.
* Fix `core.ruffle.$hash.js` not being imported.

package.json

@@ -13,6 +13,7 @@
     "@fortawesome/fontawesome-free": "^5.11.2",
     "@rails/ujs": "^7.0.1",
     "@rails/webpacker": "=6.0.0-rc.6",
+    "@ruffle-rs/ruffle": "0.1.0-nightly.2022.1.31",
     "core-js": "^3.20.3",
     "css-loader": "^6.5.1",
     "dropzone": "^6.0.0-beta.2",
@@ -26,7 +27,6 @@
     "postcss-import": "^14.0.2",
     "postcss-loader": "^6.2.1",
     "postcss-preset-env": "^7.2.3",
-    "ruffle-mirror": "^2022.1.13",
     "sass": "^1.48.0",
     "sass-loader": "^12.4.0",
     "tippy.js": "^6.3.7",
@@ -48,8 +48,7 @@
     "webpack-dev-server": "^4.7.3"
   },
   "resolutions": {
-    "webpack": "5.66.0",
-    "ruffle-mirror": "2022.1.13"
+    "webpack": "5.66.0"
   },
   "scripts": {
     "eslint-all": "yarn run eslint --plugin eslint-plugin-ignore-erb --ext .js,.js.erb app/javascript/src/javascripts",