Lesion-metrics

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* Fix minor bug in IoU per lesion computation

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* Make package compliant with mypy
* Add lesion volume calculation
* Add support for IoU threshold for LTPR and LFPR

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* Fix type hints in volume correlation
* Correct name of LFPR (lesion false positive rate) to LFDR (lesion false discovery rate)

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* Fix correlation computation in CLI and other minor typos.

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* Update code style to black and improve docs.

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* Fix repo name.