Refactor Math.sumPrecise to follow Hermes unified iterator approach

- Unified iterator approach for both arrays and iterables (addresses aardvark179's review)
- Enhanced overflow handling with biased partials tracking
- Improved special value handling for -0, infinities, and NaN
- Extracted common algorithm into sumPreciseFromIterable helper method
- Added TwoSum inner class for cleaner two-sum algorithm implementation
- Better edge case handling for MAX_DOUBLE boundaries

This refactoring eliminates code duplication between array-like and iterable
paths by using a single iterator-based approach, similar to the Hermes
implementation pattern.

Author: anivar

rhino-feature-matrix.html

@@ -0,0 +1 @@
+Subproject commit a970fc00cc33b58d0b84d4b290ea46a185c8fcf1