Improve Assembly Highlight (add AVX registers, xmm, ymm, zmm)

[GabrielFrigo4]

The register keywords al, ah, ax, eax, rax are now highlighted correctly, but the vector keywords such as xmm0, xmm1, ..., xmm31, ymm0, ymm1, ..., ymm31 and zmm0, zmm1, ..., zmm31 are not highlighted correctly.

I would like the vector registers to also be highlighted correctly (they usually have the same highlighting as rax)