feat: added title based tooltips and updated handle styling to reflect in and output handles

ref: N25B-450

src/pages/VisProgPage/visualProgrammingUI/nodes/EndNode.tsx

@@ -60,7 +60,7 @@ export default function EndNode(props: NodeProps<EndNode>) {
         </div>
         <SingleConnectionHandle type="target" position={Position.Left} id="target" rules={[
           allowOnlyConnectionsFromType(["phase"])
-        ]}/>
+        ]} title="Connect to a phaseNode"/>
       </div>
     </>
   );