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/extensions/query.ts

@@ -0,0 +1,17 @@
+import type { NoteBlockModel } from '@blocksuite/affine-model';
+import type { GfxModel } from '@blocksuite/std/gfx';
+import type { BlockModel } from '@blocksuite/store';
+
+import type { Connectable } from '../managers/connector-manager';
+
+export function isConnectable(
+  element: GfxModel | null
+): element is Connectable {
+  return !!element && element.connectable;
+}
+
+export function isNoteBlock(
+  element: BlockModel | GfxModel | null
+): element is NoteBlockModel {
+  return !!element && 'flavour' in element && element.flavour === 'affine:note';
+}