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/root/src/root-service.ts

@@ -0,0 +1,48 @@
+import { RootBlockSchema } from '@blocksuite/affine-model';
+import {
+  getBlockSelectionsCommand,
+  getImageSelectionsCommand,
+  getSelectedBlocksCommand,
+  getTextSelectionCommand,
+} from '@blocksuite/affine-shared/commands';
+import type { BlockComponent } from '@blocksuite/std';
+import { BlockService } from '@blocksuite/std';
+
+import type { RootBlockComponent } from './types.js';
+
+export abstract class RootService extends BlockService {
+  static override readonly flavour = RootBlockSchema.model.flavour;
+
+  get selectedBlocks() {
+    let result: BlockComponent[] = [];
+    this.std.command
+      .chain()
+      .tryAll(chain => [
+        chain.pipe(getTextSelectionCommand),
+        chain.pipe(getImageSelectionsCommand),
+        chain.pipe(getBlockSelectionsCommand),
+      ])
+      .pipe(getSelectedBlocksCommand)
+      .pipe(({ selectedBlocks }) => {
+        if (!selectedBlocks) return;
+        result = selectedBlocks;
+      })
+      .run();
+    return result;
+  }
+
+  get selectedModels() {
+    return this.selectedBlocks.map(block => block.model);
+  }
+
+  get viewportElement() {
+    const rootId = this.std.store.root?.id;
+    if (!rootId) return null;
+    const rootComponent = this.std.view.getBlock(
+      rootId
+    ) as RootBlockComponent | null;
+    if (!rootComponent) return null;
+    const viewportElement = rootComponent.viewportElement;
+    return viewportElement;
+  }
+}