bun-compat: expose Bun.serve over Perry's native HTTP server

[proggeramlug]

Summary

Implement a Bun-compatible serve facade over Perry's existing native HTTP/HTTPS stack. This is a synthetic parity target, independent of any application corpus.

Minimal fixture

import { serve } from "bun";

const server = serve({
  hostname: "127.0.0.1",
  port: 0,
  idleTimeout: 0,
  development: false,
  fetch(request, server) {
    const address = server.requestIP(request)?.address ?? "unknown";
    return new Response(`${request.method}:${address}`);
  },
  error(error) {
    return new Response(error.message, { status: 500 });
  },
});

console.log(server.hostname, server.port > 0);
const response = await fetch(`http://127.0.0.1:${server.port}/`);
console.log(response.status, await response.text());
server.unref();
server.stop(true);

Initial acceptance surface

• ephemeral port: 0, hostname binding, hostname and port properties;
• Fetch API request/response handler, async handlers, and error handler;
• requestIP(request);
• stop(closeActiveConnections?), ref, and unref;
• TLS options can be a follow-up if a clear unsupported diagnostic is emitted.

A Bun-native CLI has two reachable call sites: a loopback MCP server in a normal plugin path and a gateway HTTP server using requestIP, TLS options, idleTimeout, and stop(true).

Official API: https://bun.sh/docs/runtime/http/server.

Current Perry lowers neither Bun.serve nor an equivalent named export from "bun". Verified at 898e531590d874923314e48cf11950fc47c7f098.