added cjs distribution command and tsconfig

[heyAyushh]

Problem

• current package only supports ECMAScript Modules (ESM).
• devs relying on CommonJS (CJS) cannot utilize the package.
• limits compatibility with various Node.js environments and tools.

Changes

• Added CJS distribution to the existing ESM-only package.
• existing ESM functionality is there.
• improved overall package accessibility and usability.

[mikemaccana]

@heyAyushh - great work - I love that this still uses tsc, I don't want to have to deal with anothertsup-like system that is complex and has many failure modes again.

[mikemaccana]

What is this? It's not documented in https://docs.npmjs.com/cli/v10/configuring-npm/package-json

[mikemaccana]

From Ayush: https://github.com/webpack/webpack/blob/main/examples/side-effects/README.md - helps webpack users to bundlethis more efficiently.