New corelib support

[rozyczko]

Migrated EasyReflectometryLib from the old corelib architecture (ObjBase, CollectionBase) to the new architecture (ModelBase, ModelCollection, CalculatorFactoryBase).

Base class replacement

Calculator ownership migration

Interface removal

[github-actions]

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[codecov]

Codecov Report

❌ Patch coverage is 87.85872% with 55 lines in your changes missing coverage. Please review.
✅ Project coverage is 87.72%. Comparing base (7c7786b) to head (cf82a0e).

Files with missing lines	Patch %	Lines
src/easyreflectometry/calculators/factory.py	78.04%	10 Missing and 8 partials ⚠️
src/easyreflectometry/sample/base_core.py	85.71%	9 Missing and 8 partials ⚠️
src/easyreflectometry/model/model.py	92.79%	1 Missing and 7 partials ⚠️
...eflectometry/sample/collections/base_collection.py	83.33%	3 Missing and 3 partials ⚠️
...c/easyreflectometry/calculators/calculator_base.py	94.73%	1 Missing and 3 partials ⚠️
...flectometry/sample/collections/layer_collection.py	50.00%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #290      +/-   ##
===========================================
- Coverage    88.07%   87.72%   -0.35%     
===========================================
  Files           45       45              
  Lines         2458     2828     +370     
  Branches       285      377      +92     
===========================================
+ Hits          2165     2481     +316     
- Misses         236      258      +22     
- Partials        57       89      +32     

Flag	Coverage Δ
unittests	87.72% <87.85%> (-0.35%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
...easyreflectometry/calculators/refl1d/calculator.py	100.00% <100.00%> (ø)
.../easyreflectometry/calculators/refnx/calculator.py	100.00% <100.00%> (ø)
src/easyreflectometry/project.py	77.77% <100.00%> (+0.11%)	⬆️
...yreflectometry/sample/assemblies/gradient_layer.py	96.72% <100.00%> (+0.05%)	⬆️
...eflectometry/sample/assemblies/surfactant_layer.py	83.90% <100.00%> (+0.18%)	⬆️
src/easyreflectometry/sample/collections/sample.py	94.44% <100.00%> (+3.70%)	⬆️
.../sample/elements/layers/layer_area_per_molecule.py	94.28% <100.00%> (ø)
...etry/sample/elements/materials/material_density.py	100.00% <100.00%> (ø)
...try/sample/elements/materials/material_solvated.py	98.30% <100.00%> (-0.11%)	⬇️
...flectometry/sample/collections/layer_collection.py	90.90% <50.00%> (-9.10%)	⬇️
... and 5 more

... and 4 files with indirect coverage changes

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