Adds diff visualizer.

visualization-bundle/src/visualizers/index.ts

@@ -3,6 +3,7 @@ export * from "./graph";
 export * from "./grid-visualizer";
 export * from "./image-visualizer";
 export * from "./monaco-text-visualizer";
+export * from "./monaco-text-diff-visualizer";
 export * from "./perspective-table-visualizer";
 export * from "./plotly-visualizer";
 export * from "./simple-text-visualizer";