Added github action to trigger doc build

Author: dgomezg

.github/workflows/docs.yml

@@ -0,0 +1,54 @@
+name: Trigger documentation build
+
+on:
+  push:
+    branches:
+      - 'main'
+    paths:
+      - 'docs/**'
+  pull_request:
+    branches:
+      - 'main'
+    paths:
+      - 'docs/**'
+
+env:
+  VALE_VERSION: ${{ vars.LIBRARY_VALE_VERSION || '3.3.0' }}
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Install Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '20'
+
+      - name: Install vale
+        run: |
+          wget "https://github.com/errata-ai/vale/releases/download/v${VALE_VERSION}/vale_${VALE_VERSION}_Linux_64-bit.tar.gz"
+          sudo tar -xvzf vale_${VALE_VERSION}_Linux_64-bit.tar.gz -C /usr/local/bin vale
+
+      - name: Generate Site
+        run: |
+          cd docs/_playbook/
+          npm install
+          export GIT_CREDENTIALS='https://axoniq-devops:${{ secrets.LIBRARY_DEVBOT_TOKEN }}@github.com'
+          echo 'Using' `vale -v`
+          npx antora playbook.yaml
+
+      - name: Notify AxonIQ Library (if a push to a tracked branch)
+        if: ${{ github.event_name == 'push'}}
+        uses: actions/github-script@v7
+        with:
+          github-token: ${{ secrets.LIBRARY_DEVBOT_TOKEN }}
+          script: |
+            await github.rest.actions.createWorkflowDispatch({
+              owner: 'AxonIQ',
+              repo: 'axoniq-library-site',
+              workflow_id: 'publish.yml',
+              ref: 'main'
+            })