feat(demo): reference the demo of bv-experimental-add-ons (#536)

Add a reference to the repository in the README.
Add a card linked to the live demo in the HTML home page.

README.md

@@ -85,6 +85,7 @@ especially when using `bpmn-visualization` prior version `0.27.0`.
 - [Draw a path](demo/draw-path/README.md) - show how to draw a path
 - [Demo for Bonita Day 2023](https://github.com/process-analytics/bonita-day-demo-2023#readme) - monitor process and case progress, assign new actors to overdue tasks, view past activities, and track the live execution of a process.
 - [Prediction demo](demo/prediction/README.md) - show how to use `bpmn-visualization` to visualize prediction data.
+- [New experimental features](https://github.com/process-analytics/bv-experimental-add-ons#readme) - Show the demos of the new experimental features for `bpmn-visualization` provided by `bv-experimental-add-ons`.
 
 
 ## Tutorials

examples/index.html

@@ -361,6 +361,22 @@ <h2 class="bg-dark">Demos</h2>
                             </div>
                         </a>
                     </div>
+
+                    <div class="col-md-12 col-4 p-2">
+                        <a href="https://process-analytics.github.io/bv-experimental-add-ons" target="_blank" class="card-link">
+                            <div class="card p-2">
+                                <div class="card-header">
+                                    <div class="card-title">New experimental features</div>
+                                    <div class="card-subtitle"></div>
+                                </div>
+                                <div class="card-image">
+                                    <img src="static/img/preview/demo/bv-experimental-add-ons.png" class="img-responsive" alt="bv-experimental-add-ons demos image">
+                                </div>
+                                <div class="card-body">Show the demos of the new experimental features for <code>bpmn-visualization</code> provided by <code>bv-experimental-add-ons</code>.</div>
+                                <div class="card-footer"></div>
+                            </div>
+                        </a>
+                    </div>
                 </div>
             </section>