get time series interval into the xarray coordinates

[toloudis]

Feature Description

CZI Metadata value T.Interval has the time in seconds between time samples in a timeseries image. We should use it along with physical_pixel_sizes to determine the xarray coordinate scaling.

This might be a bioio reader api change but I am initiating it from czi first.
We could also have the main api return a time interval from a single api call too.

Use Case

As we process more time series data, we would like to elevate this key piece of metadata to the same precedence as physical pixel sizes.

Solution

bioimage.physical_pixel_size
bioimage.time_interval
This may be connected to adding units as well.