Codebase quality improvements + more node api compt

[cs01]

Summary

Large feature branch adding Node.js API compatibility, async I/O, and HTTP server improvements. 100 files changed, ~7800 lines added across 6 commits.

Interactive installer

• install.sh rewritten with interactive y/n prompts, toolchain verification (llvm, clang, cmake), and automatic shell profile detection (~/.bashrc, ~/.zshrc, etc.)

HTTP server (picohttpparser + lws-bridge rewrite)

• Replaced mongoose with lws-bridge.c backed by libuv for HTTP/WebSocket serving
• Integrated picohttpparser for fast HTTP request parsing
• Added benchmark suite (bench/) for HTTP and WebSocket throughput vs Node, Bun, Go, and C

Node.js API compatibility

Major push to match Node.js standard library surface area:

child_process module (sync + async)

• child_process.execSync(cmd) — popen-based, returns stdout string
• child_process.spawnSync(cmd, args?) — fork/exec with separate stdout/stderr pipes
• child_process.exec(cmd) — async via uv_queue_work, returns Promise<{stdout, stderr, status}>
• child_process.spawn(cmd, args?, onStdout, onStderr, onExit) — streaming callbacks via uv_spawn
• C bridge split into sync (child-process-bridge.c, always linked) and async (child-process-spawn.c, conditionally linked with libuv)

Async filesystem

• fs.readFile(path) and fs.writeFile(path, data) returning Promises via uv_queue_work
• New AsyncFsGenerator with shared %FsWorkContext struct for all async fs/cp operations

Promise improvements

• Promise.allSettled(), Promise.any(), Promise.finally()
• New PromiseGenerator and extracted promise-handlers.ts sub-module

Path module expansion

• path.extname(), path.isAbsolute(), path.normalize(), path.parse(), path.relative()

Date module

• new Date() constructor, Date.now(), instance methods (.getTime(), .toISOString(), .toLocaleDateString(), etc.)

Math module expansion

• Math.random(), Math.sign(), Math.trunc(), trig functions (sin, cos, tan, asin, acos, atan, atan2)

Crypto module

• crypto.randomUUID() via OpenSSL's RAND_bytes

Console

• console.time() / console.timeEnd() / console.timeLog() via uv_hrtime
• Extracted to console-timers.ts sub-module

Array methods

• findIndex(), indexOf(), reverse(), shift(), unshift(), sort(), splice()
• Extracted into sub-modules: array/reorder.ts, array/search.ts, array/sort.ts, array/splice.ts

String methods

• padEnd()

Set methods

• Set.delete(), Set.clear(), Set.forEach()

fs module

• fs.copyFileSync(), fs.renameSync()

CI fixes

• Added child-process-bridge.o and child-process-spawn.o to release artifact packaging and vendor verification in all 3 build jobs (linux-musl, linux-glibc, macos)
• Removed duplicate self-hosting test step in glibc job

Architecture

• Extracted method-calls sub-modules: console.ts, promise-handlers.ts, string-methods.ts
• Extracted array sub-modules: reorder.ts, search.ts, sort.ts, splice.ts
• New standalone generators: async-fs.ts, child-process.ts, console-timers.ts, date.ts, promise.ts

Test plan

• 339 unit tests pass (all existing + ~30 new fixture tests covering every new API)
• Self-hosting verification passes (Stage 0 + Stage 1)
• New test fixtures: cp-execsync, cp-bare-execsync, cp-spawnsync, cp-spawnsync-shell, cp-exec-async, cp-spawn, fs-readfile-async, fs-writefile-async, fs-copyfile, fs-rename, promise-allsettled, promise-any, promise-finally, date-instance, crypto-uuid, console-time, path-extname, path-isabsolute, path-normalize, path-parse, path-relative, math-random, math-sign, math-trig, math-trunc, array-findindex, array-indexof, array-reverse, array-shift-unshift, array-sort, array-splice, set-delete, string-padend