Maxence/mlp like sequential container

[maxencelebaron]

This PR refactors the growing MLP containers by turning them into SequentialGrowingContainer objects.

The goal is to simplify the implementation of functions manipulating the models by avoiding architecture-specific case distinctions.

• Refactored:

  • growing_mlp.py
  • growing_mlp_mixer.py
  • growing_residual_mlp.py

• Converted the corresponding model structures to SequentialGrowingContainer.

This makes downstream model manipulation code cleaner and more generic.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

Flag	Coverage Δ
unittests	94.41% <100.00%> (-0.01%)	⬇️

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Files with missing lines	Coverage Δ
src/gromo/containers/growing_mlp.py	100.00% <100.00%> (ø)
src/gromo/containers/growing_mlp_mixer.py	96.62% <100.00%> (ø)
src/gromo/containers/growing_residual_mlp.py	83.80% <100.00%> (ø)

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