Function perseus_cli::check_env

pub fn check_env() -> Result<()>

Checks if the user has the necessary prerequisites on their system (i.e. cargo and wasm-pack). These can all be checked by just trying to run their binaries and looking for errors. If the user has other paths for these, they can define them under the environment variables PERSEUS_CARGO_PATH and PERSEUS_WASM_PACK_PATH.