Benchmarks tools and push-pull

• to_xarray with xarray as argument
• Push-pull with units conversion and xarray

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assigned to @mlange

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• 33dd7c29...c291932e - 5 commits from branch main
• dbf1f8d7 - add benchmarks for to_xarray with xarray

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• b8652ff9 - add benchmarks for push-pull with units conversion

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changed title from Benchmarks for to_xarray with xarray to Benchmarks tools and push-pull

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• afcfad36 - add benchmarks for push-pull using xarray

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• 7103c7ae - add benchmarks for push-pull using xarray

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mentioned in commit dfe756b7

merged