slice of Hex

[yegor256]

Let's add a new functionality of slicing to Hex, which should take a part of the data and return a new Hex:

let a = Hex::from_str_bytes("Hello, world!");
let b = a[5..];
println!("{b}");

Should print , world!.

It should be very similar to how slicing works for strings in Rust.

[yegor256]

@UARTman can you help with this please?

[l3r8yJ]

this one is closed, isn't it?

[yegor256]

@l3r8yJ I don't think it's solved, I don't see any tests for it. Do you?

[l3r8yJ]

@yegor256 then I'll take it