adding missing ctors #785

Job	Run time
check src/dotnet	18s
check src/bindings	12s
check workflow_ci	13s
check build scripts and tools	12s
build python sdist	14m 56s
build rhino3dm.js	13m 30s
build python 3.9 linux bdist	14m 1s
build python 3.10 linux bdist	14m 11s
build python 3.9 windows bdist	11m 48s
build python 3.10 windows bdist	13m 36s
build python 3.9 macos bdist	36m 1s
build python 3.10 macos bdist	24m 2s
build dotnet	0s
	2h 23m 0s

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