Refactoring - topology visualization support for segments and service paths

- Introduce topology visualization cards in segment and service path templates
- Include shared topology visualization partial for code reuse
- Extend SegmentView to build topology data via build_segment_topology and build_service_path_topology
- Register new topology builder utilities in utils.__init__
- Simplify servicepath.html by replacing inline Cytoscape.js code with reusable include

Author: jirivrany

cesnet_service_path_plugin/templates/cesnet_service_path_plugin/inc/topology_visualization.html

@@ -302,6 +302,29 @@ <h5 class="card-header">
             </div>
         </div>
     {% endif %}
+
+    {# Service Path Topology Visualization Card #}
+    <div class="row mb-3">
+        <div class="col col-12">
+            <div class="card">
+                <h5 class="card-header">
+                    {{ topology_title }}
+                    <div class="card-actions">
+                        <button id="fit-topology" class="btn btn-ghost-primary btn-sm" title="Fit to screen">
+                            <i class="mdi mdi-fit-to-screen" aria-hidden="true"></i>
+                        </button>
+                        <button id="reset-topology" class="btn btn-ghost-primary btn-sm" title="Reset layout">
+                            <i class="mdi mdi-refresh" aria-hidden="true"></i>
+                        </button>
+                    </div>
+                </h5>
+                <div class="card-body">
+                    <div id="cy-topology" style="width: 100%; height: 600px; border: 1px solid rgba(59, 130, 246, 0.08); border-radius: 20px;"></div>
+                </div>
+            </div>
+        </div>
+    </div>
+    {% include './inc/topology_visualization.html' %}
 
     <!-- A and B cards in full width row -->
     <div class="row mb-3">
@@ -399,4 +422,4 @@ <h5 class="card-header">
     <div class="row">
         <div class="col col-md-12">{% plugin_full_width_page object %}</div>
     </div>
-{% endblock content %}
+{% endblock content %}