Support CommonJS in the JS package

[murrayee]

Summary

This PR adds CommonJS support for the js package while keeping the existing ESM exports.

Changes

• Build both ESM and CommonJS outputs with tsup
• Add require entries to exports for:
  • cloakbrowser
  • cloakbrowser/puppeteer
  • cloakbrowser/human
• Set main to the CommonJS entrypoint
• Keep module pointing to the ESM entrypoint

Why

The package already exposed ESM entrypoints, but it did not provide official CommonJS entrypoints through exports.

This change allows usage like:

const { launch } = require('cloakbrowser');

[Cloak-HQ]

Thanks for the PR, CommonJS support is something we want.

I built and tested the branch locally and hit two blockers that need fixing before merge.

1. The CJS output doesn't load on the Node range we support.

With bundle: false, esbuild keeps the NodeNext .js import specifiers as-is, so each emitted .cjs ends up requiring its ESM sibling:

dist/index.cjs → require("./playwright.js")   // .js is ESM, the .cjs sibling is never used

Because the package is "type": "module", those .js files are ES modules, so require() throws:

ERR_REQUIRE_ESM: require() of ES Module dist/playwright.js from dist/index.cjs not supported

This affects all three new require entrypoints (., ./puppeteer, ./human).
It fails on Node 18.x and on Node 20/22 before require(esm) was unflagged, so it breaks for most of our engines: >=18 range.

Setting bundle: true in tsup.config.ts fixes it, I tested it and require('cloakbrowser') loads cleanly with require(esm) disabled.

2. npm run build currently exits non-zero.

The tsup DTS pass fails:

src/args.ts: TS2591: Cannot find name 'path' / 'process'
TS5101: Option 'baseUrl' is deprecated (TypeScript 6.x)

@types/node is installed and tsc --noEmit passes, so the DTS builder just isn't picking up the node types.
The side effect is that no .d.ts files get emitted, which leaves the exports.types entries pointing at missing files and drops types for TS consumers.

Could you flip to bundle: true and get the DTS build resolving node types so npm run build is green?
Happy to help if you get stuck on the DTS config.

[murrayee]

@Cloak-HQ Thanks for the detailed review. I switched tsup to bundle: true and fixed the DTS config to resolve Node types and ignore the TS 6.0 deprecation warning. npm run build and npm test are both green locally now.