Add lite deploy

.github/workflows/deploy.yml

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+name: Build JupyterLite and Deploy
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - '*'
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+
+      - name: Setup Python
+        uses: actions/setup-python@v4
+        with:
+          python-version: '3.10'
+
+      - name: Install mamba
+        uses: mamba-org/provision-with-micromamba@main
+        with:
+          micromamba-version: '1.4.2'
+          environment-file: 'lite/build-environment.yml'
+
+      - name: Download extension package
+        uses: dawidd6/action-download-artifact@v2
+        with:
+          workflow: 'build.yml'
+          workflow_conclusion: 'success'
+          name: extension-artifacts
+
+      - name: Install the extension
+        shell: bash -l {0}
+        run: |
+          cp ./jupytercad_core/dist/jupytercad*.whl ./jupytercad_lab/dist/jupytercad*.whl ./jupytercad_app/dist/jupytercad*.whl .
+          python -m pip install jupytercad*.whl
+
+      - name: Build the lite site
+        shell: bash -l {0}
+        working-directory: lite
+        run: |
+          set -eux
+          mkdir -p content && cp ../examples/test.jcad ./content
+          jupyter lite build --contents content --output-dir dist
+
+      - name: Upload artifact
+        uses: actions/upload-pages-artifact@v1
+        working-directory: lite
+        with:
+          path: ./dist
+
+  deploy:
+    needs: build
+    if: github.ref == 'refs/heads/main'
+    permissions:
+      pages: write
+      id-token: write
+
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+
+    runs-on: ubuntu-latest
+    steps:
+      - name: Deploy to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v1

lite/build-environment.yml

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+name: build-env
+channels:
+  - conda-forge
+dependencies:
+  - python
+  - pip
+  - jupyterlite-core >=0.2.0,<0.3.0
+  - jupyterlite-xeus>=0.1.2,<0.2

lite/environment.yml

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+name: xeus-python-kernel
+channels:
+  - https://repo.mamba.pm/emscripten-forge
+  - conda-forge
+dependencies:
+  - xeus-python

lite/jupyter-lite.json

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+{
+  "jupyter-lite-schema-version": 0,
+  "jupyter-config-data": {
+    "appName": "My JupyterCAD App",
+    "disabledExtensions": ["@jupyter/collaboration-extension"]
+  }
+}