Add `APX` ISA extension #1023

Job	Run time
Amalgamated build (Ubuntu 22.04)	6s
CMake build + tests (macos-latest )	13s
fuzzing (address)	11m 25s
CMake build + tests (macos-latest -DZYAN_NO_LIBC=ON)	17s
Meson build + tests (macos-latest, debug default)	25s
fuzzing (undefined)	11m 21s
MSBuild build (windows-2022)	1m 23s
Meson build + tests (windows-2022, debug default)	1m 45s
CMake build + tests (windows-2022 )	1m 49s
fuzzing (memory)	10m 10s
Meson build + tests (ubuntu-22.04, debug default)	11s
CMake build + tests (windows-2022 -DZYAN_NO_LIBC=ON)	51s
CMake build + tests (ubuntu-22.04 )	10s
Meson build + tests (windows-2022, debug NO_LIBC)	1m 34s
CMake build + tests (ubuntu-22.04 -DZYAN_NO_LIBC=ON)	14s
CMake build + tests (ubuntu-22.04 -DZYDIS_MINIMAL_MODE=ON -DZYDIS_FEATURE_ENCODER=OFF)	12s
Meson build + tests (ubuntu-22.04, debug NO_LIBC)	11s
CMake build + tests (windows-2022 -TClangCL)	2m 11s
Meson build + tests (macos-latest, release default)	27s
Meson build + tests (windows-2022, release default)	1m 42s
Meson build + tests (ubuntu-22.04, release default)	13s
Meson build + tests (windows-2022, release NO_LIBC)	2m 6s
Meson build + tests (ubuntu-22.04, release NO_LIBC)	10s
Meson build + tests (ubuntu-22.04, minsize )	23s
	49m 29s

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