feat: implementing impact calculations using auxiliary data shifting method

[MoAly98]

closes #514.

To-do:

• write tests for new method
• create special ranking plot type to visualize
• write test for new visualize method
• Remove NotImplementedError raises

*  Added implementation of auxiliary data shifting method to compute parameter impacts
*  Added a new ranking plot style for the new method of impacts

[codecov]

Codecov Report

Attention: Patch coverage is 98.12500% with 3 lines in your changes missing coverage. Please review.

Project coverage is 99.86%. Comparing base (1576a4d) to head (5d441aa).
Report is 2 commits behind head on master.

Files with missing lines	Patch %	Lines
src/cabinetry/fit/__init__.py	97.85%	1 Missing and 2 partials ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##            master     #516      +/-   ##
===========================================
- Coverage   100.00%   99.86%   -0.14%     
===========================================
  Files           22       22              
  Lines         2096     2219     +123     
  Branches       291      311      +20     
===========================================
+ Hits          2096     2216     +120     
- Misses           0        1       +1     
- Partials         0        2       +2     

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[alexander-held]

We should first get in #515 before this one, right?