cargo-build vs genies_derive vs procenv_macro

Wrapper around cargo instructions accesible in `build.rs` with better type safety and support for modern features. Includes functions by default. Macros are optional, but do provide better experience when there is need to do formatting and variable number of arguments at the same time which is ideal for DSLs.

A powerful derive macro for configuration management in Rust

Procedural macro implementation for procenv