Add GitHub Actions workflow for content building

Automatically builds HTML pages when:
- Spreadsheet data files change (data/*.xlsx)
- Templates change (templates/*.html)
- Build scripts change (scripts/*.py)

The workflow:
1. Validates all data files
2. Builds HTML pages from templates
3. Runs all tests
4. Commits updated HTML if changes detected (push to main only)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <[email protected]>

Author: jeremymanning

.github/workflows/build-content.yml

@@ -0,0 +1,64 @@
+name: Build Content Pages
+
+on:
+  push:
+    branches:
+      - main
+    paths:
+      - 'data/**'
+      - 'templates/**'
+      - 'scripts/**'
+  pull_request:
+    branches:
+      - main
+    paths:
+      - 'data/**'
+      - 'templates/**'
+      - 'scripts/**'
+  workflow_dispatch:  # Allow manual triggering
+
+jobs:
+  validate-and-build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.11'
+          cache: 'pip'
+
+      - name: Install dependencies
+        run: pip install -r requirements-build.txt
+
+      - name: Validate data files
+        working-directory: scripts
+        run: python validate_data.py
+
+      - name: Build HTML pages
+        working-directory: scripts
+        run: python build.py
+
+      - name: Run tests
+        run: python -m pytest tests/ -v
+
+      - name: Check for changes
+        id: check_changes
+        run: |
+          if [[ -n $(git status --porcelain *.html) ]]; then
+            echo "changes=true" >> $GITHUB_OUTPUT
+          else
+            echo "changes=false" >> $GITHUB_OUTPUT
+          fi
+
+      - name: Commit and push changes
+        if: github.event_name == 'push' && steps.check_changes.outputs.changes == 'true'
+        run: |
+          git config user.name 'github-actions[bot]'
+          git config user.email 'github-actions[bot]@users.noreply.github.com'
+          git add publications.html people.html software.html
+          git commit -m "Auto-build: Update content pages from spreadsheet data"
+          git push