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/code/src/configs/slash-menu.ts

@@ -0,0 +1,8 @@
+import { type SlashMenuConfig } from '@blocksuite/affine-widget-slash-menu';
+
+export const codeSlashMenuConfig: SlashMenuConfig = {
+  disableWhen: ({ model }) => {
+    return model.flavour === 'affine:code';
+  },
+  items: [],
+};