Add method to import from fesom2 #1613

Job	Run time
cache-pixi-lock / Generate output	1m 4s
Unit tests: ubuntu \| pixi run -e test-py311 tests	1m 28s
Unit tests: ubuntu \| pixi run -e test-latest tests	1m 30s
Unit tests: ubuntu \| pixi run -e test-minimum tests	1m 32s
Integration: ${{ matrix.os }} \| pixi run -e ${{ matrix.pixi-environment }} tests-notebooks	0s
TypeChecking: pixi run typing	0s
merge-test-artifacts	1s
	5m 35s

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