Implementing `convert.nemo_to_sgrid()` #2093

Job	Run time
cache-pixi-lock / Generate output	1m 29s
Unit tests: windows \| pixi run -e test tests	6m 34s
Unit tests: ubuntu \| pixi run -e test-py311 tests	3m 39s
Unit tests: ubuntu \| pixi run -e test tests	2m 42s
Unit tests: ubuntu \| pixi run -e test-py313 tests	3m 39s
Unit tests: ubuntu \| pixi run -e test-minimum tests	3m 42s
Integration: ${{ matrix.os }} \| pixi run -e ${{ matrix.pixi-environment }} tests-notebooks	0s
TypeChecking: pixi run typing	0s
merge-test-artifacts	0s
	21m 45s

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