feat: 2 and 3d async chunked loading #66

Job	Run time
check-manifest	10s
test (macos-latest, 3.11) / macos-latest py3.11 pyqt6	29s
test (ubuntu-latest, 3.10) / ubuntu-latest py3.10 pyqt6	51s
test (macos-latest, 3.10) / macos-latest py3.10 pyqt6	37s
test (macos-latest, 3.8) / macos-latest py3.8 pyqt6	1m 18s
test (ubuntu-latest, 3.11) / ubuntu-latest py3.11 pyqt6	1m 34s
test (ubuntu-latest, 3.8) / ubuntu-latest py3.8 pyqt6	2m 3s
test-array-libs (macos-latest, 3.12) / macos-latest py3.12 pyqt6	1m 5s
test-array-libs (macos-latest, 3.9) / macos-latest py3.9 pyqt6	1m 12s
test-array-libs (ubuntu-latest, 3.12) / ubuntu-latest py3.12 pyqt6	2m 37s
test-array-libs (ubuntu-latest, 3.9) / ubuntu-latest py3.9 pyqt6	3m 13s
Deploy	0s
upload_coverage / Upload coverage	8s
	15m 17s

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