Add `APX` ISA extension #1000

Job	Run time
CMake build + tests (macos-latest )	12s
CMake build + tests (macos-latest -DZYAN_NO_LIBC=ON)	11s
Meson build + tests (macos-latest, debug default)	21s
MSBuild build (windows-2022)	1m 15s
CMake build + tests (windows-2022 )	53s
fuzzing (address)	1m 27s
Meson build + tests (windows-2022, debug default)	1m 17s
fuzzing (undefined)	1m 21s
CMake build + tests (windows-2022 -DZYAN_NO_LIBC=ON)	1m 1s
Meson build + tests (ubuntu-22.04, debug default)	21s
CMake build + tests (ubuntu-22.04 )	14s
fuzzing (memory)	1m 29s
Meson build + tests (windows-2022, debug NO_LIBC)	47s
CMake build + tests (ubuntu-22.04 -DZYAN_NO_LIBC=ON)	7s
Meson build + tests (ubuntu-22.04, debug NO_LIBC)	13s
CMake build + tests (ubuntu-22.04 -DZYDIS_MINIMAL_MODE=ON -DZYDIS_FEATURE_ENCODER=OFF)	16s
CMake build + tests (windows-2022 -TClangCL)	2m 0s
Meson build + tests (macos-latest, release default)	26s
Meson build + tests (windows-2022, release default)	2m 38s
Meson build + tests (ubuntu-22.04, release default)	21s
Meson build + tests (windows-2022, release NO_LIBC)	43s
Meson build + tests (ubuntu-22.04, release NO_LIBC)	11s
Amalgamated build (Ubuntu 22.04)	6s
Meson build + tests (ubuntu-22.04, minsize )	20s
	18m 10s

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