refactor(editor): mount worker renderer in editor host (#10055)

This would allow for easier integration with current test runner, since the two column layout is removed.

The `ViewportTurboRender` canvas and its debug UI are only enabled if the extension is added, which won't affect the AFFiNE entry.

<img width="945" alt="image" src="https://github.com/user-attachments/assets/dc82daa4-cbed-4eb9-9660-28c3f7d35722" />

blocksuite/playground/examples/renderer/editor.ts

@@ -12,10 +12,11 @@ presetsEffects();
 
 export const doc = createEmptyDoc().init();
 export const editor = new AffineEditorContainer();
-editor.pageSpecs = editor.pageSpecs.concat([ViewportTurboRendererExtension]);
-editor.edgelessSpecs = editor.edgelessSpecs.concat([
+editor.pageSpecs = [...editor.pageSpecs, ViewportTurboRendererExtension];
+editor.edgelessSpecs = [
+  ...editor.edgelessSpecs,
   ViewportTurboRendererExtension,
-]);
+];
 
 editor.doc = doc;
 editor.mode = 'edgeless';