feat: fixed dark mode compliancy for nodes and background

ref: N25B-114

src/visualProgrammingUI/VisProgUI.tsx

@@ -13,6 +13,7 @@ import {
     useEdgesState,
     reconnectEdge,
     addEdge,
+    MiniMap,
     MarkerType,
     type Edge,
     type Connection,
@@ -110,6 +111,7 @@ const VisProgUI = ()=>  {
                     proOptions={{hideAttribution: true }}
                 >
                     <Controls />
+                    <MiniMap />
                     <Background />
                 </ReactFlow>
             </div>