argon2id password hash

[gmcodentech]

Hello, I want to add this example in the section of Cryptography. As the 'Argon2' is a powerful and popular algorithms, I think adding this would be really helpful for all zig learners.

[gmcodentech]

@jiacai2050, could you please review and help me fix these failing checks. Thank you

[jiacai2050]

/Users/runner/work/_temp/361a268d-a7af-421e-b2e4-61d09d2f6c10/zig-aarch64-macos-0.14.1/lib/std/start.zig:647:46: error: root source file struct '02-03' has no member named 'main'
    const ReturnType = @typeInfo(@TypeOf(root.main)).@"fn".return_type.?;
                                         ~~~~^~~~~
assets/src/02-03.zig:1:1: note: struct declared here
const std = @import("std");
^~~~~

The logs already tell you what went wrong: https://github.com/zigcc/zig-cookbook/actions/runs/17290154717/job/49075399319?pr=113

You need to define a main method.

[jiacai2050]

You also need to update the toc.md file to include this recipe.

[gmcodentech]

Hi, I think it is good now to proceed to be merged. Thank you

[jiacai2050]

The salt is hardcoded, not generated.

[gmcodentech]

It is purposely hardcoded for testing using testing.expectEqualStrings. May be, I should update the description in 'src/en-US/02-03-argon2.smd' file stating the same. (hardcoded for unit testing)

[jiacai2050]

I think we don't need that test, we can just print the hashed password

[gmcodentech]

Ok, I will make this change.

[gmcodentech]

This is done

[jiacai2050]

Delete this line

[gmcodentech]

Corrected these lines. Please let me know if any particular line should be deleted. Thanks again!