Add Bun password hashing to benchmarks (Bcrypt, Argon2)

[notramo]

The Bun runtime supports password hashing out of the box. I guess it uses the implementations in the Zig standard library.
https://bun.sh/guides/util/hash-a-password

Since Bun is rapidly gaining popularity, many developers will wonder if the built-in functions or the ones in the napi-rs packages are faster. Adding the Bun stdlib to the benchmarks can help them decide if they should install this package or use the stdlib.