Devlogs and writing.

KAIO v0.2.0: Writing GPU Kernels in Rust at 92.5% of cuBLAS

KAIO is a Rust-native GPU kernel framework. Write #[gpu_kernel] in Rust, compile to PTX, hit 92.5% of cuBLAS sgemm on an RTX 4090. No CUDA toolkit, no Python, works on Windows.