Add build-dist gh action

.github/workflows/build-dist.yml

@@ -0,0 +1,33 @@
+name: Build distribution
+run-name: ${{ github.actor }} is building python distribution
+
+on:
+  push:
+    branches:
+      - main
+      - gh-actions  # for testing
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v4
+
+    - name: Set up Python
+      uses: actions/setup-python@v5
+
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install build
+
+    - name: Build source distribution
+      run: python -m build .
+
+    - name: Upload distribution to GitHub Releases
+      uses: actions/upload-artifact@v4
+      with:
+        name: shelloracle-dist
+        path: dist/