Add `APX` ISA extension #1020

Job	Run time
CMake build + tests (macos-latest )	15s
Meson build + tests (macos-latest, debug default)	21s
CMake build + tests (macos-latest -DZYAN_NO_LIBC=ON)	12s
Amalgamated build (Ubuntu 22.04)	7s
fuzzing (address)	11m 36s
CMake build + tests (windows-2022 )	1m 32s
Meson build + tests (windows-2022, debug default)	2m 0s
fuzzing (undefined)	9m 49s
CMake build + tests (windows-2022 -DZYAN_NO_LIBC=ON)	1m 10s
Meson build + tests (ubuntu-22.04, debug default)	12s
MSBuild build (windows-2022)	1m 17s
fuzzing (memory)	10m 18s
CMake build + tests (ubuntu-22.04 )	8s
Meson build + tests (windows-2022, debug NO_LIBC)	1m 51s
CMake build + tests (ubuntu-22.04 -DZYAN_NO_LIBC=ON)	34s
Meson build + tests (ubuntu-22.04, debug NO_LIBC)	19s
CMake build + tests (ubuntu-22.04 -DZYDIS_MINIMAL_MODE=ON -DZYDIS_FEATURE_ENCODER=OFF)	10s
Meson build + tests (macos-latest, release default)	20s
Meson build + tests (windows-2022, release default)	1m 56s
Meson build + tests (ubuntu-22.04, release default)	18s
Meson build + tests (windows-2022, release NO_LIBC)	1m 3s
Meson build + tests (ubuntu-22.04, release NO_LIBC)	9s
CMake build + tests (windows-2022 -TClangCL)	2m 7s
Meson build + tests (ubuntu-22.04, minsize )	30s
	48m 14s

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