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/callout/src/callout-keymap.ts

@@ -0,0 +1,34 @@
+import { CalloutBlockModel } from '@blocksuite/affine-model';
+import { matchModels } from '@blocksuite/affine-shared/utils';
+import {
+  BlockSelection,
+  KeymapExtension,
+  TextSelection,
+} from '@blocksuite/std';
+
+export const CalloutKeymapExtension = KeymapExtension(std => {
+  return {
+    Backspace: ctx => {
+      const text = std.selection.find(TextSelection);
+      if (text && text.isCollapsed() && text.from.index === 0) {
+        const event = ctx.get('defaultState').event;
+        event.preventDefault();
+
+        const block = std.store.getBlock(text.from.blockId);
+        if (!block) return false;
+        const parent = std.store.getParent(block.model);
+        if (!parent) return false;
+        if (!matchModels(parent, [CalloutBlockModel])) return false;
+
+        std.selection.setGroup('note', [
+          std.selection.create(BlockSelection, {
+            blockId: parent.id,
+          }),
+        ]);
+
+        return true;
+      }
+      return false;
+    },
+  };
+});