feat: add update functionality for Gmail drafts

- Introduced a new tool to update existing Gmail drafts, allowing users to modify draft content, recipients, and subject lines.
- Updated the Gmail tools registry to include the new update_gmail_draft tool.
- Enhanced the GmailKBSyncService to support draft ID handling during synchronization.
- Added UI components for the update draft functionality in the web application, improving user interaction with Gmail drafts.

surfsense_web/app/dashboard/[search_space_id]/new-chat/[[...chat_id]]/page.tsx

@@ -50,6 +50,7 @@ import {
 	CreateGmailDraftToolUI,
 	SendGmailEmailToolUI,
 	TrashGmailEmailToolUI,
+	UpdateGmailDraftToolUI,
 } from "@/components/tool-ui/gmail";
 import {
 	CreateGoogleDriveFileToolUI,
@@ -1696,6 +1697,7 @@ export default function NewChatPage() {
 			<UpdateCalendarEventToolUI />
 			<DeleteCalendarEventToolUI />
 			<CreateGmailDraftToolUI />
+			<UpdateGmailDraftToolUI />
 			<SendGmailEmailToolUI />
 			<TrashGmailEmailToolUI />
 			<SandboxExecuteToolUI />