Reduce `Buffer` usage or limit its exposure to the end application

[tien]

Zondax's libraries currently rely on Buffer directly from the global scope, which causes issues for front-end environments that don't include a Buffer polyfill in the global window object.

To resolve this, the following approaches could be considered:

1. Switch to using typed arrays.
2. Implement a cross-platform buffer solution, such as https://www.npmjs.com/package/buffer, and remove Buffer from public-facing APIs (e.g. accept typed arrays or strings instead).

🔗 zboto Link