feat(segmentation mode): Add create, and export SEG with Brushes (#3632)

extensions/default/src/ViewerLayout/index.tsx

@@ -44,7 +44,7 @@ function ViewerLayout({
 
     if (!entry) {
       throw new Error(
-        `${id} is not a valid entry for an extension module, please check your configuration or make sure the extension is registered.`
+        `${id} is not valid for an extension module. Please verify your configuration or ensure that the extension is properly registered. It's also possible that your mode is utilizing a module from an extension that hasn't been included in its dependencies (add the extension to the "extensionDependencies" array in your mode's index.js file)`
       );
     }