refactor(editor): unify directories naming (#11516)

**Directory Structure Changes**

- Renamed multiple block-related directories by removing the "block-" prefix:
  - `block-attachment` → `attachment`
  - `block-bookmark` → `bookmark`
  - `block-callout` → `callout`
  - `block-code` → `code`
  - `block-data-view` → `data-view`
  - `block-database` → `database`
  - `block-divider` → `divider`
  - `block-edgeless-text` → `edgeless-text`
  - `block-embed` → `embed`

blocksuite/affine/blocks/root/src/widgets/modal/modal.ts

@@ -0,0 +1,22 @@
+import { WidgetComponent } from '@blocksuite/std';
+import { nothing } from 'lit';
+
+import { createCustomModal } from './custom-modal.js';
+
+export const AFFINE_MODAL_WIDGET = 'affine-modal-widget';
+
+export class AffineModalWidget extends WidgetComponent {
+  open(options: Parameters<typeof createCustomModal>[0]) {
+    return createCustomModal(options, this.ownerDocument.body);
+  }
+
+  override render() {
+    return nothing;
+  }
+}
+
+declare global {
+  interface HTMLElementTagNameMap {
+    [AFFINE_MODAL_WIDGET]: AffineModalWidget;
+  }
+}