refactor(editor): rename block-std to std (#11250)

Closes: BS-2946

blocksuite/playground/apps/_common/components/custom-frame-panel.ts

@@ -1,5 +1,5 @@
-import { ShadowlessElement } from '@blocksuite/affine/block-std';
 import { WithDisposable } from '@blocksuite/affine/global/lit';
+import { ShadowlessElement } from '@blocksuite/affine/std';
 import type { TestAffineEditorContainer } from '@blocksuite/integration-test';
 import { effect } from '@preact/signals-core';
 import { css, html, nothing } from 'lit';