Add `APX` ISA extension #993

Job	Run time
Amalgamated build (Ubuntu 22.04)	5s
fuzzing (address)	1m 21s
CMake build + tests (macos-latest )	12s
fuzzing (undefined)	1m 21s
Meson build + tests (macos-latest, debug default)	19s
fuzzing (memory)	1m 21s
CMake build + tests (macos-latest -DZYAN_NO_LIBC=ON)	11s
MSBuild build (windows-2022)	51s
Meson build + tests (windows-2022, debug default)	2m 3s
CMake build + tests (windows-2022 )	1m 14s
CMake build + tests (windows-2022 -DZYAN_NO_LIBC=ON)	54s
Meson build + tests (ubuntu-22.04, debug default)	21s
CMake build + tests (ubuntu-22.04 )	7s
Meson build + tests (windows-2022, debug NO_LIBC)	1m 22s
CMake build + tests (ubuntu-22.04 -DZYAN_NO_LIBC=ON)	7s
Meson build + tests (ubuntu-22.04, debug NO_LIBC)	9s
CMake build + tests (ubuntu-22.04 -DZYDIS_MINIMAL_MODE=ON -DZYDIS_FEATURE_ENCODER=OFF)	6s
Meson build + tests (macos-latest, release default)	27s
CMake build + tests (windows-2022 -TClangCL)	1m 29s
Meson build + tests (windows-2022, release default)	1m 15s
Meson build + tests (ubuntu-22.04, release default)	25s
Meson build + tests (windows-2022, release NO_LIBC)	1m 25s
Meson build + tests (ubuntu-22.04, release NO_LIBC)	12s
Meson build + tests (ubuntu-22.04, minsize )	22s
	17m 39s

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