feat(server): add read doc tool (#12811)

close AI-186















#### PR Dependency Tree


* **PR #12811** 👈

This tree was auto-generated by
[Charcoal](https://github.com/danerwilliams/charcoal)

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

- **New Features**
- Added a new tool enabling users to read document content and metadata
within a workspace, with enforced access control.
- **Improvements**
- Updated tool interfaces and outputs to support the document reading
functionality seamlessly.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

packages/backend/server/src/plugins/copilot/providers/utils.ts

@@ -13,6 +13,7 @@ import { ZodType } from 'zod';
 import {
   createDocEditTool,
   createDocKeywordSearchTool,
+  createDocReadTool,
   createDocSemanticSearchTool,
   createExaCrawlTool,
   createExaSearchTool,
@@ -386,6 +387,7 @@ export interface CustomAITools extends ToolSet {
   doc_edit: ReturnType<typeof createDocEditTool>;
   doc_semantic_search: ReturnType<typeof createDocSemanticSearchTool>;
   doc_keyword_search: ReturnType<typeof createDocKeywordSearchTool>;
+  doc_read: ReturnType<typeof createDocReadTool>;
   web_search_exa: ReturnType<typeof createExaSearchTool>;
   web_crawl_exa: ReturnType<typeof createExaCrawlTool>;
 }
@@ -451,6 +453,10 @@ export class TextStreamParser {
             result += `\nSearching the keyword "${chunk.args.query}"\n`;
             break;
           }
+          case 'doc_read': {
+            result += `\nReading the doc "${chunk.args.doc_id}"\n`;
+            break;
+          }
         }
         result = this.markAsCallout(result);
         break;