Checking Costantine library and copying some ideas and reference it

[unbalancedparentheses]

Comment by Constantine creator on how he made constantine library so fast:

• Nim has better macro and compile-time evaluation capabilities so I implemented an assembly codegenerator in Nim macro.
• Most Rust finite fields libraries return their result instead of in-place mutation. This is slow if the compiler doesn't manage to do return value optimization.
• algorithm differences
• Parallelization difference: I parallelize at 3 different levels of the MSM. Rust lib parallelize at only one-level. Also Rayon doesn't support futures and you can use it for significant latency hiding in bucket reductions.

The underlying parallel library in general is underestimated and I improve performance by up to 50% with just a better barrier algorithm here for CPU with 16+ cores: mratsim/constantine#227 (comment)

[MauroToscano]

I moved all the MSM related optimizations to issue #730