Refactor exception types

[michael-nml]

This PR has two purposes:

• Introduction of a new NannyMLException type to serve as base class for all NannyML exceptions. It's intended to easily allow capturing exceptions generated by NannyML, while ignoring others.
• Fixing a bug introduced in commit fe92481b389ae2b0ed32d2804cadadc573807567 which caused InvalidArgumentsException to be incorrectly translated to CalculatorException.

[codecov]

Codecov Report

Patch coverage: 84.53% and project coverage change: +0.06 🎉

Comparison is base (ce4fc18) 83.16% compared to head (a207ae7) 83.22%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #307      +/-   ##
==========================================
+ Coverage   83.16%   83.22%   +0.06%     
==========================================
  Files          82       82              
  Lines        6408     6428      +20     
  Branches      971      972       +1     
==========================================
+ Hits         5329     5350      +21     
+ Misses        819      814       -5     
- Partials      260      264       +4     

Impacted Files	Coverage Δ
nannyml/io/base.py	51.25% <ø> (ø)
nannyml/io/db/database_writer.py	83.67% <ø> (ø)
nannyml/io/db/mappers.py	90.65% <ø> (ø)
nannyml/io/file_reader.py	37.03% <ø> (ø)
nannyml/io/file_writer.py	96.15% <ø> (ø)
nannyml/io/pickle_file_writer.py	90.00% <ø> (ø)
nannyml/io/raw_files_writer.py	75.00% <ø> (ø)
nannyml/io/store/base.py	45.16% <ø> (ø)
nannyml/io/store/file_store.py	28.57% <ø> (ø)
nannyml/io/store/serializers.py	48.88% <0.00%> (ø)
... and 14 more

... and 1 file with indirect coverage changes

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