Add `APX` ISA extension #895

Job	Run time
Amalgamated build (Ubuntu 22.04)	5s
MSBuild build (windows-2022)	1m 38s
fuzzing (address)	1m 10s
fuzzing (undefined)	1m 13s
CMake build + tests (macOS-latest )	21s
fuzzing (memory)	1m 10s
CMake build + tests (macOS-latest -DZYAN_NO_LIBC=ON)	17s
CMake build + tests (windows-2022 )	1m 49s
CMake build + tests (windows-2022 -DZYAN_NO_LIBC=ON)	1m 23s
CMake build + tests (ubuntu-22.04 )	9s
CMake build + tests (ubuntu-22.04 -DZYAN_NO_LIBC=ON)	10s
CMake build + tests (ubuntu-22.04 -DZYDIS_MINIMAL_MODE=ON -DZYDIS_FEATURE_ENCODER=OFF)	6s
CMake build + tests (windows-2022 -TClangCL)	2m 24s
	11m 55s

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