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/bookmark/src/index.ts

@@ -0,0 +1,7 @@
+export * from './adapters';
+export * from './bookmark-block';
+export * from './bookmark-spec';
+export * from './commands';
+export * from './components';
+export { BookmarkSlashMenuConfigIdentifier } from './configs/slash-menu';
+export * from './edgeless-clipboard-config';