Add example and github actions

.github/workflows/publish.yml

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+# This is a name of the workflow
+name: build
+# Controls when the workflow will run
+on:
+  # Triggers the workflow on published releases
+  release:
+    types: [published]
+# A workflow run is made up of one or more jobs that can run sequentially or in parallel
+jobs:
+  # This workflow contains a single job called "build"
+  build:
+    # The type of runner that the job will run on
+    runs-on: ubuntu-latest
+    # Steps represent a sequence of tasks that will be executed as part of the job
+    steps:
+      - name: Checkout
+        # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
+        uses: actions/checkout@v3
+
+      - name: Setup Node
+        # Setup node environment
+        uses: actions/setup-node@v3
+        with:
+          # Node version. Run "node -v" to check the latest version
+          node-version: 16.x
+          registry-url: https://registry.npmjs.org/
+
+      - name: Install dependencies
+        run: npm install
+
+      - name: Build
+        run: npm run build
+
+      - name: Publish
+        run: npm publish
+
+        env:
+          # We need this to our NPM account
+          NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}

example/.gitignore

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+node_modules
+.parcel-cache
+dist

example/README.md

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+# How to start example page?
+
+Then in the example directory, run all dependencies:
+
+### `npm install`
+
+Then use the command:
+
+### `npm start`
+
+Open [http://localhost:1234](http://localhost:1234) to view it in the browser.