Add support for the functions

[tbhaxor]

Description

Support bhai bula {name} aur bhej {list of params} the return statement can bhai wapis kar {return}

What it would look like

hi bhai
    bhai bula greet aur bhej name, age {
        bhai wapis kar name + age;
    }
bye bhai

Motivation: #94 (comment)

Domain

Bhai Lang

Type of Contribution

Addition, Enhancement

Code of Conduct

• I follow Contributing Guidelines & Code of conduct of bhai-lang.

[tbhaxor]

I always wanted to learn how languages work and this seems like a good start. Can I work on this?. It will take some time to understand and then implement.

[bhushanvaidya]

the return statment should be "ye le bhai"

[thecodacus]

added a PR for this,
you guys can check it in preview build https://6234ac37ec8e100008f579b5--bhailang-preview.netlify.app/#playground