feat: RAG Integration (#238)

* feat: add rag provider and retriever

* feat: retriever tool

* feat: add retriever tool to the researcher node

* feat: add rag http apis

* feat: new message input supports resource mentions

* feat: new message input component support resource mentions

* refactor: need_web_search to need_search

* chore: RAG integration docs

* chore: change example api host

* fix: user message color in dark mode

* fix: mentions style

* feat: add local_search_tool to researcher prompt

* chore: research prompt

* fix: ragflow page size and reporter with

* docs: ragflow integration and add acknowledgment projects

* chore: format

web/src/core/api/chat.ts

@@ -4,6 +4,7 @@
 import { env } from "~/env";
 
 import type { MCPServerMetadata } from "../mcp";
+import type { Resource } from "../messages";
 import { extractReplayIdFromSearchParams } from "../replay/get-replay-id";
 import { fetchStream } from "../sse";
 import { sleep } from "../utils";
@@ -15,6 +16,7 @@ export async function* chatStream(
   userMessage: string,
   params: {
     thread_id: string;
+    resources?: Array<Resource>;
     auto_accepted_plan: boolean;
     max_plan_iterations: number;
     max_step_num: number;