Add file support to agent chat (#13187)

https://github.com/user-attachments/assets/911d5d8d-cc2e-4c18-9f93-2663d84ff9ef

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Co-authored-by: Raphaël Bosi <71827178+bosiraphael@users.noreply.github.com>
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Co-authored-by: Félix Malfait <felix.malfait@gmail.com>
Co-authored-by: Félix Malfait <felix@twenty.com>
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Co-authored-by: Thomas des Francs <tdesfrancs@gmail.com>
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Co-authored-by: Lucas Bordeau <bordeau.lucas@gmail.com>

packages/twenty-server/src/engine/metadata-modules/agent/agent-chat.controller.ts

@@ -58,7 +58,7 @@ export class AgentChatController {
   @Post('stream')
   async streamAgentChat(
     @Body()
-    body: { threadId: string; userMessage: string },
+    body: { threadId: string; userMessage: string; fileIds?: string[] },
     @AuthUserWorkspaceId() userWorkspaceId: string,
     @Res() res: Response,
   ) {
@@ -67,6 +67,7 @@ export class AgentChatController {
         threadId: body.threadId,
         userMessage: body.userMessage,
         userWorkspaceId,
+        fileIds: body.fileIds || [],
         res,
       });
     } catch (error) {