Add support for bigdecimals

[Steffan153]

Clojure has these (2M), Python (with a long import), and other langs we haven't added yet.

[MichalMarsalek]

Uh, Polygolf only has integers so I'm a bit confused by what you'd use these for.

[Steffan153]

Yet. It will have floats eventually, right? And bigdecimals are useful for constant holes. But I suppose we could do without them

[MichalMarsalek]

Me and Jared didn't plan to add them. How do you compile to languages that only have ints?

[Steffan153]

It won't compile, just like languages without bigints won't compile when you use them.
Floats are quit a necessety IMO, as you need them for a lot of holes, and most langs have them.

[MichalMarsalek]

I kinda wanted to support bigint emulation but supporting float/decimal emulation seems like a while another league.