Implement multiple precision support for numbers

[mertyildiran]

Implement arbitrary length integer and arbitrary precision floating-point numbers support using GNU Multiple Precision Arithmetic Library. Here is a tutorial.

[dumblob]

Beware there is a significant difference between multiple precision and arbitrary precision. I'd guess GMP lib is not what you're looking for and you're probably wanting something like mpdecimal.

[mertyildiran]

@dumblob it could be, yeah thanks for the clarification. I'll update the issue description.