fix(core): should pass mode to AffineEditorContainer (#6522)

Without mode there will be some features missing in blocksuite

packages/frontend/core/src/components/blocksuite/block-suite-editor/blocksuite-editor-container.tsx

@@ -164,6 +164,9 @@ export const BlocksuiteEditorContainer = forwardRef<
           ? docRef.current?.updateComplete
           : edgelessRef.current?.updateComplete;
       },
+      get mode() {
+        return mode;
+      },
     };
 
     const proxy = new Proxy(api, {