Rewrite README to match locked TS conventions; minor tool/doc tweaks

Reflects the resolved wayfinder map (issue #1): no build process ever,
separate MCP server process + registration per backend, no lint/format
tooling. Also includes small wording tweaks to the qwen_delegate tool
description and timeout comment made outside this session.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01CRnb5Gqdu7gVTQrwAqFdfJ

src/qwen-delegate-server.ts

@@ -16,8 +16,7 @@ server.registerTool(
     title: "Delegate to qwen",
     description:
       "Delegate a light, low-stakes prompt (simple lookups, quick research, boilerplate text, " +
-      "small single-file edits) to the local qwen-code CLI, offloading it from the main session. " +
-      "Can take several minutes to respond — only use for work that doesn't block on a fast reply.",
+      "small single-file edits) to the local qwen-code CLI, offloading it from the main session. ",
     inputSchema: {
       prompt: z.string().describe("The prompt to send to qwen, non-interactively."),
     },