docs: add dynamic entity-relationship diagram to docs (#28130)

.github/workflows/superset-docs-deploy.yml

@@ -39,6 +39,13 @@ jobs:
         uses: actions/setup-node@v4
         with:
           node-version: '18'
+      - name: Setup Python
+        uses: ./.github/actions/setup-backend/
+      - name: Compute Entity Relationship diagram (ERD)
+        run: |
+          python scripts/erd.py
+          curl -L http://sourceforge.net/projects/plantuml/files/1.2023.7/plantuml.1.2023.7.jar/download > ~/plantuml.jar
+          java -jar ~/plantuml.jar -v -tsvg -r -o "${{ github.workspace }}/docs/static/img/erd.svg" "${{ github.workspace }}/scripts/erd/erd.puml"
       - name: yarn install
         run: |
           yarn install --check-cache