i.sentinel1.pyrosargeocode: fixed pixel spacing

[griembauer]

Not really an issue, more a discussion item:

Why is the pixel spacing of the geocoded SAR images in i.sentinel1.pyrosargeocode fixed to the DEMs resolution? (https://github.com/NVE/actinia_modules_nve/blob/main/src/imagery/i.sentinel1.pyrosargeocode/i.sentinel1.pyrosargeocode.py#L528)
Couldn't it be also set to e.g. the region or a user defined value?

[ninsbl]

That could be allowed if useful. My thought here was that ideally, interpolation of the DEM is done by the user deliberately beforehand. But using the region resolution (with an option to align to DEM) could be a good approach too (like e.g. in r.slope.aspect)...

[griembauer]

A suggestion on this issue is implemented in #47