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/embed/src/embed-iframe-block/style.ts

@@ -0,0 +1,29 @@
+import { css } from 'lit';
+
+export const embedIframeBlockStyles = css`
+  .affine-embed-iframe-block-container {
+    display: flex;
+    width: 100%;
+    border-radius: 8px;
+    user-select: none;
+    align-items: center;
+    justify-content: center;
+    position: relative;
+  }
+
+  .affine-embed-iframe-block-container.in-surface {
+    height: 100%;
+  }
+
+  .affine-embed-iframe-block-overlay {
+    position: absolute;
+    top: 0;
+    left: 0;
+    width: 100%;
+    height: 100%;
+    display: none;
+  }
+  .affine-embed-iframe-block-overlay.show {
+    display: block;
+  }
+`;