Add comparison with node:crypto and clarify parameter usage in README.md

[cbodin]

Thank you for the awesome work with this library and getting a native implementation of argon2 into node.

I began work on replacing this library with the native implementation in a project, but i quickly noticed that they are not comparable at all.

After reading through your The future of node-argon2 issue i quickly came to the conclusion that this library is still the way to go for password hashing.

I think it would be good to include some of your comments from that issue in the readme, and a comparison table with the native implementation.

Password hashing is hard, and the native APIs are not user friendly if you don't know what you are doing. Nudging people to use this library instead seems like the way to go.