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/surface/src/utils/get-surface-block.ts

@@ -0,0 +1,16 @@
+import type { BlockStdScope } from '@blocksuite/std';
+import type { Store } from '@blocksuite/store';
+
+import type { SurfaceBlockComponent } from '../surface-block';
+import type { SurfaceBlockModel } from '../surface-model';
+
+export function getSurfaceBlock(doc: Store) {
+  const blocks = doc.getBlocksByFlavour('affine:surface');
+  return blocks.length !== 0 ? (blocks[0].model as SurfaceBlockModel) : null;
+}
+
+export function getSurfaceComponent(std: BlockStdScope) {
+  const surface = getSurfaceBlock(std.store);
+  if (!surface) return null;
+  return std.view.getBlock(surface.id) as SurfaceBlockComponent | null;
+}