Add workflow.

.github/workflows/doc-gen.yml

@@ -0,0 +1,38 @@
+# docs: https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions
+
+name: Build and Test
+
+on:
+  workflow_dispatch:
+  pull_request:
+
+jobs:
+  build_and_test:
+    runs-on: ubuntu-22.04
+
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Install peakrd-uvm
+        run: |
+          python3 -m pip install \
+              peakrdl-uvm==2.2.0 \
+              peakrdl-regblock==0.10.0 \
+              peakrdl-html==2.9.0 \
+              peakrdl-ipxact==3.3.0
+
+      - name: Generate docs
+        run: |
+          echo ############# Running script
+          tools/scripts/reg_doc_gen.sh
+
+      - name: Stage documents
+        mkdir -p /tmp/pages-docs
+        cp -R src/integration/docs/caliptra_reg_html /tmp/pages-docs/internal-regs
+        cp -R src/soc_ifc/docs/caliptra_top_reg_html /tmp/pages-docs/external-regs
+        find /tmp/pages-docs
+
+#      - name: Generate GitHub Pages artifacts
+#        uses: actions/upload-pages-artifact@v1
+#        with:
+#          path: