Add JPEG XL Open/Read support via libjxl #1122

Job	Run time
sdist	26s
Windows AMD64	38m 54s
Windows x86	34m 5s
Windows ARM64	14m 47s
macOS arm64	34m 5s
macOS 10.13 x86_64	13m 52s
macOS 10.15 x86_64	37m 9s
manylinux2014 and musllinux aarch64	34m 40s
manylinux_2_28 x86_64	40m 52s
manylinux2014 and musllinux x86_64	24m 27s
macOS 10.10 x86_64	30m 22s
manylinux_2_28 aarch64	35m 26s
iOS arm64 simulator	13m 10s
iOS arm64 device	47m 9s
iOS x86_64 simulator	10m 17s
Upload release to PyPI	1s
Upload wheels to scientific-python-nightly-wheels	1s
Count dists	1s
	6h 49m 44s

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