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/widgets/slash-menu/src/effects.ts

@@ -0,0 +1,15 @@
+import { AFFINE_SLASH_MENU_WIDGET } from './consts';
+import { InnerSlashMenu, SlashMenu } from './slash-menu-popover';
+import { AffineSlashMenuWidget } from './widget';
+
+export function effects() {
+  customElements.define(AFFINE_SLASH_MENU_WIDGET, AffineSlashMenuWidget);
+  customElements.define('affine-slash-menu', SlashMenu);
+  customElements.define('inner-slash-menu', InnerSlashMenu);
+}
+
+declare global {
+  interface HTMLElementTagNameMap {
+    [AFFINE_SLASH_MENU_WIDGET]: AffineSlashMenuWidget;
+  }
+}