* simplify Planck catalogue
* add MCXC and base survey
* Add 2MPP classes
* move match to MCXC to Planck
* add halo catalogue
* rm comment
* rm unused imports
* Move conversion to box
* add min mass
* Run on all simulations
* rm old function
* add combined catalogue
* add halo positions
* add knn neighbors
* set to 5 sims for testing
* add docstring
* Switch to neighbours in a catalogue
* rename io to read
* fix indentation
* rename to read
* io -> read
* add import
* add RealisationMatcher
* io -> read
* add docstrings
* add search_sim_indiices
* update todo
* keep make_cat at 10 for now
* update nb
