Implement experimental point cloud export API #2523

Job	Run time
lint	3m 59s
create-source-distribution	54s
create-windows-binary-distribution (3.7)	5m 46s
create-windows-binary-distribution (3.8)	4m 51s
create-windows-binary-distribution (3.9)	5m 52s
create-windows-binary-distribution (3.10)	4m 36s
create-windows-binary-distribution (3.11)	4m 31s
create-windows-binary-distribution (3.12)	5m 46s
test-linux-source-distribution (ubuntu:20.04)	21m 58s
test-linux-source-distribution (ubuntu:22.04)	21m 43s
test-linux-source-distribution (ubuntu:24.04)	22m 10s
test-linux-source-distribution (ubuntu:24.10)	21m 17s
test-linux-source-distribution (fedora:40)	22m 27s
test-linux-source-distribution (fedora:41)	21m 51s
test-windows-binary-distribution (3.7)	32m 11s
test-windows-binary-distribution (3.8)	33m 55s
test-windows-binary-distribution (3.9)	33m 55s
test-windows-binary-distribution (3.10)	32m 22s
test-windows-binary-distribution (3.11)	31m 39s
test-windows-binary-distribution (3.12)	32m 18s
deploy	0s
	6h 4m 1s

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