Compute distance between a point and a line

[sfmig]

Is your feature request related to a problem? Please describe.
It would be useful to add functionality to compute the distance between a point and a line. That is the distance of the segment perpendicular to the line that passes through the point.

We may want to make a solution that supports both 2D and 3D data.

Additional context
We can use shapely for this, or maybe wrap it for a line drawn in the napari GUI?

A quick search took me to this napari-shapely snippet but maybe there is something more sophisticated out there.

The line in 2D could for example represent a plane (e.g. a wall) in a top view, which is relevant for boundary vector cells analyses.

Related to #370