Add SIMD optimizations and cache management improvements

[bluffblue]

• Add simd_ops.h for AVX2 optimizations
• Add cache_optimizer.h for better cache management
• Add optimized neural network layers
• Update evaluation code to use new optimizations
• Add parallel search improvements

[github-actions]

clang-format 18 needs to be run on this PR.
If you do not have clang-format installed, the maintainer will run it when merging.
For the exact version please see https://packages.ubuntu.com/noble/clang-format-18.

(execution 12963109991 / attempt 1)

[vondele]

Thanks, you'll need to explain what the PR does, provide data to demonstrate the improvements in performance, and probably split it if it implements independent ideas. For testing and contributing see also https://github.com/official-stockfish/fishtest/wiki/Creating-my-first-test

[bluffblue]

Thanks, you'll need to explain what the PR does, provide data to demonstrate the improvements in performance, and probably split it if it implements independent ideas. For testing and contributing see also https://github.com/official-stockfish/fishtest/wiki/Creating-my-first-test

ohh okay then, thanks for the respond

[vondele]

will close for now as it doesn't yet compile