Documentation: Developer notes - unstructured grid spatial hashing documentation #2327

Job	Run time
should run ci	5s
cache-pixi-lock	1m 37s
Unit tests: ubuntu \| pixi run -e test-py311 tests	3m 57s
Unit tests: ubuntu \| pixi run -e test tests	3m 4s
Unit tests: ubuntu \| pixi run -e test-minimum tests	4m 0s
build-and-upload-nightly-parcels	1m 34s
Unit tests: ubuntu \| pixi run -e test-py313 tests	4m 13s
Unit tests: windows \| pixi run -e test tests	6m 44s
Integration: ${{ matrix.os }} \| pixi run -e ${{ matrix.pixi-environment }} tests-notebooks	0s
TypeChecking: pixi run typing	0s
merge-test-artifacts	0s
	25m 14s

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