fix: NPM package cleanups

Description

For this PR I audited the package.json for improvements that can be made with regard to publishing a npm package.

The biggest impact of these changes is this library tree shakes now which means bundlers like webpack and vite will remove unused code creating smaller bundles and better user experience.

type: module

I added type module which makes this package an ESM package by default. ESM packages are packages using modern javascript:

import { foo } from 'foo'

Rather than commonjs

const foo = require('foo').foo

ESM works better with modern build tools like vite for end users as cjs cannot treeshake

Build cjs and esm

I updated the tsup config to build both cjs and esm. This creates universal compatability. I also updated the main, module, types, and exports fields according to best practices to properly point at these files. Previously ESM was not specified

sideEffects: false

So modern bundlers tree shake as much as possible as a best practice all packages that don't have side effects e.g.

// this shouldn't cause some side effect
import 'my-package'

Should specify sideEffects: false. This allows bundlers like webpack and vite to properly treeshake

Github link

I updated the github link to best practices

Testing (ignore for documentation update)

I added two lint tools that double check for compatability for npm packages

Are the types right
Publint

Type of change

[x] Bug fix

Checklist:

[x] I have read and agree to the Code of Conduct.
[x] I have signed the Contributor License Agreement (CLA).
[x] I have considered the Security Policy.
[x] I have self-reviewed and tested my code.
[x] I have updated documentation as needed.
[x] I agree to the project's custom license.

reclaimprotocol / reclaim-js-sdk