Add node js package and GitHub actions

.github/workflows/node.js.yml

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+# This workflow will do a clean installation of node dependencies, cache/restore them, build the source code and run tests across different versions of node
+# For more information see: https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-nodejs
+
+name: Node.js CI
+
+on:
+  push:
+    branches: [ "gh-pages" ]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version: [14.x, 16.x, 18.x]
+        # See supported Node.js release schedule at https://nodejs.org/en/about/releases/
+
+    steps:
+    - uses: actions/checkout@v3
+    - name: Use Node.js ${{ matrix.node-version }}
+      uses: actions/setup-node@v3
+      with:
+        node-version: ${{ matrix.node-version }}
+        cache: 'npm'
+    - run: npm ci
+    - run: npm run build --if-present
+    - run: npm test

package.json

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+{
+  "name": "skript",
+  "version": "1.0.0",
+  "description": "Documentation for Skript",
+  "main": "index.html",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/SkriptLang/Skript.git"
+  },
+  "author": "SkriptLang",
+  "license": "GPL-3.0",
+  "bugs": {
+    "url": "https://github.com/SkriptLang/Skript/issues"
+  },
+  "homepage": "https://github.com/SkriptLang/Skript#readme"
+}