Node next-compat: url helpers, module.createRequire, http server surface; fix handler fallthrough; targeted tests

[akapug]

Hi @sgammon —

This PR focuses on pragmatic Node API surface to unblock Next.js.

Included

• url helpers
  • domainToASCII/Unicode (java.net.IDN)
  • fileURLToPath/pathToFileURL (URI/Path)
  • urlToHttpOptions (protocol/hostname/port/path)
• module (minimal)
  • builtinModules, isBuiltin, createRequire(import.meta.url)
  • Resolves built-ins via ModuleRegistry; falls back to ElideUniversalJsModuleLoader for CommonJS
• http (minimal)
  • createServer(listener) wiring into Elide’s Netty pipeline
  • Server: on('request', fn), listen(port[, host][, cb]), address(), close() TODO
  • ServerResponse wrapper: setHeader/getHeader/removeHeader, writeHead, write(no-op), end (sends underlying HttpResponse), placeholders for headersSent/statusCode/statusMessage
• handler semantics
  • Non-boolean/undefined handler returns are treated as "handled" to prevent 404 fallthrough
• tests
  • NodeUrlHelpersTest (helpers presence and basics)
  • NodeCreateRequireTest (createRequire(import.meta.url) → require('node:url'))
  • NodeHttpFlowTest (createServer → listen(0) → address())
  • HandlerFallthroughTest (writes + undefined return; no fallthrough)

Rationale

• These are the frequent early blockers for Next.js. This gets a basic, correct surface so frameworks boot and serve simple SSR while we iterate on deeper Node parity (streaming/backpressure, HTTPS/HTTP2, sockets).

Notes on timers progress

• Core JS timers are implemented (JsTimers + tests) powering setTimeout/setInterval/clear*.
• The Node timers modules (node:timers, node:timers/promises) appear in-progress under tools/runtime/elide/runtime/js/modules/timers(/promises) with Bazel/TS stubs, but are not yet registered as Node built-ins here. Next step would be to wire those into ModuleRegistry (or add NodeTimersModule/NodeTimersPromisesModule) using the existing JsTimers backend.

Follow-ups I can take next

• Expand ServerResponse/IncomingMessage (mutable statusCode/statusMessage, headersSent toggling, buffered write/streaming)
• https/http2 wrappers
• urlToHttpOptions parity details
• node:module extended APIs (syncBuiltinESMExports/register/findSourceMap/SourceMap) if demanded by consumers
• Wire node:timers and node:timers/promises

Changed files

• packages/graalvm/src/main/kotlin/elide/runtime/node/url/NodeURL.kt
• packages/graalvm/src/main/kotlin/elide/runtime/node/module/NodeModules.kt
• packages/graalvm/src/main/kotlin/elide/runtime/node/http/NodeHttp.kt
• packages/graalvm/src/main/kotlin/elide/runtime/intrinsics/server/http/internal/GuestSimpleHandler.kt
• packages/graalvm/src/test/kotlin/elide/runtime/node/NodeUrlHelpersTest.kt
• packages/graalvm/src/test/kotlin/elide/runtime/node/NodeCreateRequireTest.kt
• packages/graalvm/src/test/kotlin/elide/runtime/node/NodeHttpFlowTest.kt
• packages/graalvm/src/test/kotlin/elide/runtime/node/HandlerFallthroughTest.kt

Thanks for the review!

---

Pull Request opened by Augment Code with guidance from the PR author