dev: optimized bitshifts by using a lookup table for powers of two

crates/utils/src/math.cairo

@@ -2,6 +2,7 @@ use core::integer::{u512};
 use core::num::traits::{Zero, One, BitSize, OverflowingAdd, OverflowingMul, Bounded};
 use core::panic_with_felt252;
 use core::traits::{BitAnd};
+use utils::constants::POW_2_256;
 
 // === Exponentiation ===
 
@@ -315,7 +316,6 @@ pub impl WrappingBitshiftImpl<
     +WrappingExponentiation<T>,
     +BitSize<T>,
     +Bounded<T>,
-    +Into<T, u256>,
     +TryInto<usize, T>,
     +TryInto<T, usize>,
     +TryInto<u256, T>,