Add Prod atom Python binding

[Transurgeon]

• Add python/atoms/prod.h binding header
• Register make_prod in bindings.c method table
• Add Prod converter in init.py ATOM_CONVERTERS

Note: Only full product supported (no axis parameter yet)

[Transurgeon]

@dance858 really nice progress. you are an efficient derivative writing machine!
We are almost passing all the nlp tests already.. thanks to all your coverage.
Remaining failures (12 total):
┌──────────────────────────────────┬───────┐
│ Missing Feature │ Count │
├──────────────────────────────────┼───────┤
│ broadcast_to │ 5 │
├──────────────────────────────────┼───────┤
│ MulExpression (bivariate matmul) │ 5 │
├──────────────────────────────────┼───────┤
│ Prod with axis │ 1 │
├──────────────────────────────────┼───────┤
│ rel_entr scalar │ 1 │
└──────────────────────────────────┴───────┘
apparently only these tests are failing now.
I can start thinking about broadcast_to.. it will be helpful, what do you think?

[dance858]

Awesome, thank you!

I have been working on broadcasting today. Maybe you can take a look at rel_entr scalar or prod_with_axis?