Adjust default min_tick_distance based on the grid dimensions

[claudiaalvgar]

This PR introduces a new function compute_min_tick_distance as a possible solution to replace the previous hard-coded min_tick_distance in simulation. The new function computes a minimum grid spacing for both Cartesian and Cylindrical grids, taking into account the grid dimensions.
This function provides a finer default grid for detectors of O(100µm) size. The example introduced (BEGe_03.yaml) shows the default grid spacing provided by the simulation with the previous hard-coded method using a small detector:

and using the new function:

[claudiaalvgar]

I think I implemented the changes. Now the tests are using BEGe_01.yaml with cf["units"]["length"] = "µm" and no impurities, this is the comparison using the old code:

and the new code:

[fhagemann]

That looks very nice! I can have a closer look later today.

[claudiaalvgar]

Thank you ! Is there anything else to add/change in this PR ?

[fhagemann]

I think this should be good.
We might wanna check (but can be a separate PR) if we need to adjust max_tick_distance as well, but this should be finished

[claudiaalvgar]

Nice, is this what's discussed in issue #530 or something separate ?

[fhagemann]

It’s not an issue yet, and I don‘t think we need to change anything, but just like a minimum tick distance, there is also a maximum tick distance. I just want to cross-check that, after changing the minimum tick distance, we are not messing anything up by not adjusting the maximum tick distance (default).