Model component

[henrikjacobsenfys]

Model components: Gaussian, Lorentzian, Damped Harmonic Oscillator, Delta Function, Polynomial. There is also a user defined component which is not implemented yet - it's there as a reminder.

These components are not intended to be used alone - they should go in SampleModels, which will be in 2 PRs.

[codecov]

Codecov Report

❌ Patch coverage is 98.48485% with 6 lines in your changes missing coverage. Please review.
✅ Project coverage is 98.48%. Comparing base (3d99faa) to head (b5bd527).

Files with missing lines	Patch %	Lines
src/easydynamics/sample/components.py	98.45%	6 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##           develop      #50       +/-   ##
============================================
+ Coverage     0.00%   98.48%   +98.48%     
============================================
  Files            1        2        +1     
  Lines            2      396      +394     
============================================
+ Hits             0      390      +390     
- Misses           2        6        +4     

Flag	Coverage Δ
unittests	98.48% <98.48%> (+98.48%)	⬆️

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[rozyczko]

This is a great start! No serious issues, the base class for the components is well designed and the derived classes are correctly implemented.
Only minor issues raised:

• missing type annotations (especially for return values)
• naming style consistency
• lack of tests, e.g. no coverage of copy, __repr__, convert_unit and what's most important - nothing of the base class (apart of fix_all_parameters and fit_all_parameters

[henrikjacobsenfys]

@rozyczko would you have a quick look again? I added tons of tests, fixed a few issues that they revealed, and fixed the formatting issues. I removed the user defined component for now, since I need to think more about how I want to implement it, and it's not required for the first release.