Add method to import from fesom2 #1617

Job	Run time
cache-pixi-lock / Generate output	15s
Unit tests: ubuntu \| pixi run -e test-py311 tests	2m 16s
Unit tests: ubuntu \| pixi run -e test-latest tests	2m 17s
Unit tests: ubuntu \| pixi run -e test-minimum tests	2m 32s
TypeChecking: pixi run typing	0s
Integration: ${{ matrix.os }} \| pixi run -e ${{ matrix.pixi-environment }} tests-notebooks	0s
merge-test-artifacts	0s
	7m 20s

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