Create base class

[henrikjacobsenfys]

Moves unit to a base class to centralize checks.

Also (re)introduces a name property that will replace unique_name for the users and make it easier to work with components by inheriting from EasyList. (see #117 and #70 )

Closes #92
Closes #73 as redundant

[codecov]

Codecov Report

❌ Patch coverage is 97.53086% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 97.72%. Comparing base (cec1976) to head (3559c86).

Files with missing lines	Patch %	Lines
src/easydynamics/sample_model/model_base.py	88.88%	2 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #144      +/-   ##
===========================================
- Coverage    97.75%   97.72%   -0.04%     
===========================================
  Files           37       40       +3     
  Lines         2493     2501       +8     
  Branches       422      424       +2     
===========================================
+ Hits          2437     2444       +7     
- Misses          32       34       +2     
+ Partials        24       23       -1     

Flag	Coverage Δ
integration	49.90% <56.79%> (+0.04%)	⬆️
unittests	97.72% <97.53%> (-0.04%)	⬇️

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