feat(viz): Remove nodes from the canvas

This pull request adds the possibility to remove individual nodes from an integration, currently, it supports `Camel Routes` only

Notes:
* The `otherwise` property from the `choice` node remains due to a configuration in the `VisualizationNode` class, we'll tackle this in a separate pull request.
* Removing nodes from `Pipe` and `KameletBinding` is waiting until we receive the entire flow into the `PieVisualEntity` class

Fixes: #78

packages/ui/src/components/Visualization/Canvas/Canvas.test.tsx

@@ -0,0 +1,16 @@
+import { render, waitFor } from '@testing-library/react';
+import { CamelRouteVisualEntity } from '../../../models/visualization/flows';
+import { camelRouteJson } from '../../../stubs/camel-route';
+import { Canvas } from './Canvas';
+
+describe('Canvas', () => {
+  it('should render correctly', async () => {
+    const entity = new CamelRouteVisualEntity(camelRouteJson.route);
+
+    const result = render(<Canvas entities={[entity]} />);
+
+    await waitFor(async () => expect(result.container.querySelector('#fit-to-screen')).toBeInTheDocument());
+
+    expect(result.container).toMatchSnapshot();
+  });
+});