refactor examples to import from parcels.kernels #1647

Job	Run time
cache-pixi-lock / Generate output	10s
Unit tests: ubuntu \| pixi run -e test-py311 tests	1m 1s
Unit tests: ubuntu \| pixi run -e test-latest tests	1m 2s
Unit tests: ubuntu \| pixi run -e test-minimum tests	1m 2s
TypeChecking: pixi run typing	-1s
Integration: ${{ matrix.os }} \| pixi run -e ${{ matrix.pixi-environment }} tests-notebooks	-1s
merge-test-artifacts	1s
	3m 14s

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