feat: Graph.Nearest_Neighbor_Graph #1946

Job	Run time
Build wheels on Linux (x86_64)	4m 0s
Build wheels on Linux (aarch64/manylinux)	4m 36s
Build wheels on macOS (x86_64)	3m 19s
Build wheels on Windows (ARM64)	6m 41s
Build wheels on macOS (arm64)	3m 3s
Build wheels on Windows (Win32)	6m 44s
Build sdist and test extra dependencies	3m 39s
Build with sanitizers for debugging purposes	4m 32s
Build wheels for WebAssembly	8m 19s
Build wheels on Linux (aarch64/musllinux)	3m 58s
Build wheels on Windows (x64)	6m 43s
	55m 34s

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