not all data points are preserved when creating botm.geojson

[vincentpost]

The 'and' operator in this line causes data points that have only top or botm to be discarded:

data/src/nhflodata/data/mockup/bodemlagen_pwn_2024/v2.0.0/botm/botm.py

Line 296 in 882a24d

is_original_arrays[layer_name] = ts["is_original"].values & ds["is_original"].values

Results in loss of many data points. An 'or' operator would fix this. Will test if this produces meaningful results and if it does create a PR.