[Zig] Expand Uint type operations

[roninjin10]

Summary

Expand Uint type operations in Zig to match TypeScript's 51+ functions per size.

Missing Operations (TS has, Zig lacks exposure)

Arithmetic

• plus, minus, times, dividedBy, modulo, toPower

Bitwise

• bitwiseAnd, bitwiseOr, bitwiseXor, bitwiseNot
• shiftLeft, shiftRight

Analysis

• bitLength, leadingZeros, popCount, isPowerOf2

Aggregates

• sum, product, min, max, gcd, lcm

Utilities

• clone, isZero, isValid

Current State

Zig has generic Uint type but doesn't expose all operations in public API.

Applies To

Uint8, Uint16, Uint32, Uint64, Uint128, Uint256

Note: Issue created by Claude AI assistant, not @roninjin10 or @fucory