Added divide_poly function

[jmig5776]

This PR wil implement divide function for polynomial.
Current API looks like

void divide_poly(const RCP<const Basic> &dividend, const RCP<const Basic> &divisor,
            const Ptr<RCP<const UIntPolyFlint>> &quotient,
            const Ptr<RCP<const UIntPolyFlint>> &remainder)

CC @certik @isuruf

[isuruf-bot]

Hi,

I've run clang-format and found that the code needs formatting.
Here's a commit that fixes this. isuruf-bot@e0c285d

To use the commit you can do

curl -o format.diff https://github.com/isuruf-bot/symengine/commit/e0c285d386af024b1add4481fa30f7994236b790.diff
git apply format.diff

[jmig5776]

@certik @isuruf Any suggestions for Input and Output API for this function?

[certik]

I think the API is fine for now. As we start using this more, we can refine it.

[isuruf]

There is divides_upoly at the moment which only give quotient. We can extend that API to give the remainder optionally.

[jmig5776]

There is divides_upoly at the moment which only give quotient. We can extend that API to give the remainder optionally.

Yes I saw that but I think I should create this new function rather than trying to change or edit the existing function which has its own use case.