Migrate to c-string Literals from cstr

[damaestro]

This crate has been deprecated. Rust 1.77.0 stabilized C-string literals. From that version, c"abc" can be used in place of cstr!("abc") provided by this crate. This new feature gives more concise code and faster compilation. Hence, this crate will no longer be maintained.

https://blog.rust-lang.org/2024/03/21/Rust-1.77.0.html#c-string-literals