Adding a tutorial to show gsw use in Kernels #1622

Job	Run time
cache-pixi-lock / Generate output	1m 0s
Unit tests: ubuntu \| pixi run -e test-latest tests	40s
Unit tests: ubuntu \| pixi run -e test-minimum tests	38s
Unit tests: ubuntu \| pixi run -e test-py311 tests	39s
TypeChecking: pixi run typing	0s
Integration: ${{ matrix.os }} \| pixi run -e ${{ matrix.pixi-environment }} tests-notebooks	-1s
merge-test-artifacts	1s
	2m 57s

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