QBTC Core v2.6.0: Native CUDA GPU Mining Upgrade

What's New in v2.6.0

This release marks a historic milestone for the Quantum Bitcoin (QBTC) network with the integration of an in-tree, open-source, and fee-free CUDA GPU mining backend directly into the core code.

Major Highlights:

• Core CUDA Backend: Built from the ground up to support multiple GPUs dynamically and independently.
• 0% Dev Fee: Staying true to the Cypherpunk ethos, this implementation is entirely open-source (MIT Licensed) with absolutely zero developer fees.
• CPU Optimization: Reimplemented midstate caching for the CPU hash path, improving performance for non-GPU participants.
• Seamless Fallback: Devices without NVIDIA GPUs or CUDA toolkits will seamlessly fallback to the optimized CPU mining core.

Provenance and Acknowledgements:
A massive thank you to @kaito-zero for developing this CUDA architecture entirely independently and contributing it directly to QBTC-core. This is exactly how decentralized open-source development should work.

What's Changed

• Add CUDA GPU mining backend, multi-device support, and CPU midstate caching by @kaito-zero in #9

Full Changelog: v2.5.0...v2.6.0