docs: add personalized PageRank on a grid tutorial #1747

Job	Run time
Build wheels on Linux (aarch64/musllinux)	8m 44s
Build wheels on macOS (x86_64)	17m 21s
Build wheels on Linux (aarch64/manylinux)	24m 13s
Build wheels on Linux (x86_64)	24m 27s
Build wheels on macOS (arm64)	8m 18s
Build wheels on Linux (i686)	19m 18s
Build wheels for WebAssembly	6m 9s
Build wheels on Windows (Win32)	10m 18s
Build wheels on Windows (x64)	27m 47s
Build with sanitizers for debugging purposes	2m 14s
Build sdist and test extra dependencies	3m 1s
	2h 31m 50s

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