sanity checks for TMA remapping

[ngreenwald]

In order to help prioritize user curation, we should create a couple distinct helper functions which check for likely errors in mapping.

1. Distance between mapped centroids: This function will compute the distance between the centroids of each manual/automatic pair. It will then return the names of the 'x' FOVs with the greatest centroid distance, with the threshold set by the user.
2. Duplicate mapping: This function will return the names of any manual FOVs which map to the same automatic FOVs
3. Exact matching: This function will return the names of any manual FOVs whose name doesn't exactly match the name of the automatic FOV they are mapped to

[ngreenwald]

@alex-l-kong I updated the description for what to do for the mapping validation function