Add GitHub Actions workflow for building PR docs

Author: egelhaus

.github/workflows/build-pr.yml

@@ -0,0 +1,48 @@
+---
+name: Build static docs
+
+on:
+  push:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    environment: 
+      name: build-pr
+      
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+          ref: ${{ github.event.pull_request.head.sha }}
+
+      - name: Use Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: "20.x"
+          cache: 'npm'
+
+      - run: npm ci
+      - run: npm run build --if-present
+
+      - name: Get Project Version from Git Tag
+        id: get_version
+        run: |
+          # Use 'git describe' to find the closest tag, falling back to the commit SHA if no tag is found.
+          # --tags includes all tags, --always ensures it always outputs something.
+          VERSION=$(git describe --tags --always)
+          echo "Project version is $VERSION"
+          echo "tag=$VERSION" >> $GITHUB_OUTPUT
+      
+      - name: SonarQube Analysis (Pull Request)
+        uses: SonarSource/sonarqube-scan-action@v6
+        env:
+          SONAR_TOKEN: ${{ secrets.SONAR_TOKEN }}
+          SONAR_HOST_URL: ${{ secrets.SONAR_HOST_URL }}
+        with: 
+          args: >
+            -Dsonar.projectVersion=${{ steps.get_version.outputs.tag }}
+            -Dsonar.pullrequest.key=${{ github.event.pull_request.number }}
+            -Dsonar.pullrequest.branch=${{ github.event.pull_request.head.ref }}
+            -Dsonar.pullrequest.base=${{ github.event.pull_request.base.ref }}