feat: `feedback_vertex_set()` #1643

Job	Run time
Build wheels on Linux (x86_64)	11m 52s
Build wheels on macOS (x86_64)	6m 43s
Build wheels on Linux (i686)	6m 27s
Build sdist and test extra dependencies	2m 27s
Build wheels on macOS (arm64)	6m 25s
Build wheels for WebAssembly	3m 37s
Build wheels on Windows (Win32)	16m 40s
Build with sanitizers for debugging purposes	6m 12s
Build wheels on Linux (aarch64/manylinux)	0s
Build wheels on Windows (x64)	32m 11s
Build wheels on Linux (aarch64/musllinux)	0s
	1h 32m 34s

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