feat: 2 and 3d async chunked loading #65

Job	Run time
check-manifest	12s
test (macos-latest, 3.10) / macos-latest py3.10 pyqt6	39s
test (macos-latest, 3.11) / macos-latest py3.11 pyqt6	31s
test (macos-latest, 3.8) / macos-latest py3.8 pyqt6	1m 5s
test (ubuntu-latest, 3.10) / ubuntu-latest py3.10 pyqt6	1m 1s
test (ubuntu-latest, 3.11) / ubuntu-latest py3.11 pyqt6	47s
test (ubuntu-latest, 3.8) / ubuntu-latest py3.8 pyqt6	46s
test-array-libs (macos-latest, 3.12) / macos-latest py3.12 pyqt6	1m 13s
test-array-libs (macos-latest, 3.9) / macos-latest py3.9 pyqt6	56s
test-array-libs (ubuntu-latest, 3.12) / ubuntu-latest py3.12 pyqt6	2m 56s
test-array-libs (ubuntu-latest, 3.9) / ubuntu-latest py3.9 pyqt6	2m 34s
Deploy	0s
upload_coverage / Upload coverage	5s
	12m 45s

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