feat(core): add ai draft service (#13252)

Close [AI-244](https://linear.app/affine-design/issue/AI-244)

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

* **New Features**
* Added AI chat draft persistence, allowing your chat input, quotes,
markdown, and images to be automatically saved and restored across
sessions.
* Drafts are now synchronized across chat components, so you won’t lose
your progress if you navigate away or refresh the page.

* **Improvements**
* Enhanced chat experience with seamless restoration of previously
entered content and attachments.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

packages/frontend/core/src/modules/index.ts

@@ -3,6 +3,7 @@ import { type Framework } from '@toeverything/infra';
 
 import {
   configureAIButtonModule,
+  configureAIDraftModule,
   configureAINetworkSearchModule,
   configureAIPlaygroundModule,
   configureAIReasoningModule,
@@ -110,6 +111,7 @@ export function configureCommonModules(framework: Framework) {
   configureAIReasoningModule(framework);
   configureAIPlaygroundModule(framework);
   configureAIButtonModule(framework);
+  configureAIDraftModule(framework);
   configureTemplateDocModule(framework);
   configureBlobManagementModule(framework);
   configureMediaModule(framework);