Implement InlineArray for lookup table optimization

[zamderax]

Description

Replace the current [Polynomial] lookup table with Swift 6.2's InlineArray<256, Polynomial> for better performance and memory layout.

Background

The CRC lookup table currently uses a regular Swift Array with 256 elements. Swift 6.2 introduces InlineArray which provides better performance characteristics for fixed-size arrays by storing elements inline rather than on the heap.

TODO Comment Reference

There's already a TODO comment in the code at line 196-197 in CyclicRedundancyCheck.swift:

// TODO: Replace with InlineArray<256> down the line 
// https://github.com/swiftlang/swift-evolution/blob/main/proposals/0453-vector.md

Implementation Requirements

1. Add conditional compilation to use InlineArray<256, Polynomial> when Swift 6.2+ is available
2. Fall back to regular Array<Polynomial> for backward compatibility
3. Update Package.swift to enable the experimental InlineArray feature
4. Ensure all tests continue to pass
5. Verify performance improvements

Considerations

• InlineArray is currently experimental and may require specific Swift toolchain versions
• Need to maintain backward compatibility with older Swift versions
• Should verify the feature is actually available at compile time before using it

Expected Benefits

• Improved cache locality for lookup table access
• Reduced memory allocation overhead
• Better performance for CRC calculations

References

• Swift Evolution Proposal SE-0453: Vector
• InlineArray documentation (when available)