feat(customization): new customization service api (#4688)

extensions/default/src/customizations/defaultContextMenuCustomization.ts

@@ -0,0 +1,22 @@
+export default {
+  measurementsContextMenu: {
+    inheritsFrom: 'ohif.contextMenu',
+    menus: [
+      // Get the items from the UI Customization for the menu name (and have a custom name)
+      {
+        id: 'forExistingMeasurement',
+        selector: ({ nearbyToolData }) => !!nearbyToolData,
+        items: [
+          {
+            label: 'Delete measurement',
+            commands: 'deleteMeasurement',
+          },
+          {
+            label: 'Add Label',
+            commands: 'setMeasurementLabel',
+          },
+        ],
+      },
+    ],
+  },
+};