Modflow stemmus_scope coupling with BMI

[SarahAlidoost]

• add inputs/outputs to stemmusscope bmi, see issues
• add inputs/outputs to pystemmusscope bmi
• add interpolation utility to utils in pystemmusscope, see the paper, and example matlab code
• add a notebook that shows the coupling Copy soil layer setting csv to input folder + add a BMI MODFLOW coupling notebook #104