Reduce bundle size of this package, fix CI

[tbantle22]

  ┌─────────────┬─────────┬────────┬───────────┐
  │ Metric      │ Before  │ After  │ Reduction │
  ├─────────────┼─────────┼────────┼───────────┤
  │ ESM raw     │ 12.0 MB │ 92 KB  │ 99.2%     │
  │ CJS raw     │ 12.0 MB │ 93 KB  │ 99.2%     │
  │ ESM gzipped │ 2.2 MB  │ 2.6 KB │ 99.8%     │
  └─────────────┴─────────┴────────┴───────────┘

For reducing bundle size:

• Removes large dependencies that are easy to implement inline
• Remove unused dependencies and code

For CI:

• Github actions workflow file used the wrong path so it wasn't running on PRs
• Removed next (not really necessary since it doesn't use pages)
• Get eslint and tests running and passing