feat(editor): make height of edgeless embed doc to fit content (#12089)

Close [BS-3388](https://linear.app/affine-design/issue/BS-3388/embed-doc-拖入后的初始高度不要超过800，不要限制用户随后的调整空间)

This PR impl a extension which initialize the height of added `affine-embed-edgeless-synced-doc-block` to fit its content

<!-- This is an auto-generated comment: release notes by coderabbit.ai -->
## Summary by CodeRabbit

- **New Features**
  - Improved handling of embedded synced document block height to better fit content within edgeless mode.
- **Tests**
  - Added an end-to-end test to verify correct height adjustment for embedded synced documents in edgeless mode.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

blocksuite/affine/model/src/blocks/embed/synced-doc/synced-doc-schema.ts

@@ -9,6 +9,8 @@ import {
 
 export const SYNCED_MIN_WIDTH = 370;
 export const SYNCED_MIN_HEIGHT = 64;
+// the default max height of embed doc, user can adjust height by selected rect over this value
+export const SYNCED_DEFAULT_MAX_HEIGHT = 800;
 
 export const defaultEmbedSyncedDocBlockProps: EmbedSyncedDocBlockProps = {
   pageId: '',