While BCrypt may be the desirable default in Rails for the foreseeable future, making the mechanism for hashing and verifying passwords in `has_secure_password` extendable/modular is valuable. Developers may opt for different hashing algorithms and can now extend or plug in their own alongside BCrypt in a clean and maintainable way.

This also unlocks Rails shipping with more than BCrypt as an available hashing algorithm.

Co-authored-by: Zeeshan Ishtiaq <4838801+mzishtiaq@users.noreply.github.com>