[EXPERIMENTAL]: Integrate cp-measure

[timtreis]

Associated notebook: https://github.com/scverse/squidpy_notebooks/blob/add_cpmeasure_notebook/tutorials/tutorial_cpmeasure.ipynb

[timtreis]

Note to self:

• Doesn't correctly parse str names of channels
  INFO Calculating 'cpmeasure' correlation features between channels '0' and '1'.

• Should show, for permutations, the total number of iterations (in general, the progress bar should contain a (step n out m) readout so one can know how far in the featurisation is. Can easily take more than a day given the amount of cells and cpu_cores. Should also maybe show the total runtime so far for the steps that are done

• Fails if labels and image don't have the same dimensions, despite transformation to align them