Fix linter errors

[georgeyiasemis]

Fixed some linter errors:

• Docstring fixes with docformatter
• Model Engine methods such as (compute_resolution, compute_model_per_coil,..) now independent functions in nn/utils to avoid dublication
• Added .prospector.yaml file to filter codacy checks
• Docs enhancement

[codecov[bot]]

Codecov Report

Merging #170 (ce32941) into main (d874e8d) will increase coverage by 0.23%. The diff coverage is 91.50%.

@@            Coverage Diff             @@
##             main     #170      +/-   ##
==========================================
+ Coverage   74.39%   74.63%   +0.23%     
==========================================
  Files          70       71       +1     
  Lines        6300     6111     -189     
==========================================
- Hits         4687     4561     -126     
+ Misses       1613     1550      -63     

Impacted Files	Coverage Δ
direct/cli/upload.py	0.00% <ø> (ø)
direct/data/bbox.py	54.28% <ø> (ø)
direct/data/datasets.py	75.77% <ø> (ø)
direct/data/fake.py	97.84% <ø> (ø)
direct/data/h5_data.py	64.96% <ø> (ø)
direct/data/lr_scheduler.py	70.83% <ø> (ø)
direct/data/mri_transforms.py	99.27% <ø> (ø)
direct/data/samplers.py	92.00% <ø> (ø)
direct/data/transforms.py	93.46% <ø> (ø)
direct/environment.py	18.81% <ø> (ø)
... and 48 more

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