[boards] Move docs generation to GitHub Actions

.github/workflows/docs.yml

@@ -18,12 +18,14 @@ jobs:
         with:
           python-version: '3.10'
 
-      - name: Install ltchiptool
-        run: pip install ltchiptool
+      - name: Install docs dependencies
+        run: pip install -U ltchiptool boardgen
 
-      - name: Generate static JSON files
+      - name: Generate docs and static JSON files
         run: |
           mkdir -p site/
+          boardgen ltci
+          python docs/update_docs.py
           python docs/build_json.py
           cp *.json site/