[RTM] Added more complex example of optimal estimation

[EveCharbie]

This change is 

[EveCharbie]

@pariterre What do you think of this example. If it is acceptable, I will add a test.

[codecov[bot]]

Codecov Report

Attention: 127 lines in your changes are missing coverage. Please review.

Files	Coverage Δ
bioptim/dynamics/integrator.py	95.97% <100.00%> (+0.12%)	:arrow_up:
...amples/getting_started/example_variable_scaling.py	75.00% <ø> (ø)
bioptim/interfaces/stochastic_bio_model.py	52.94% <100.00%> (+0.94%)	:arrow_up:
bioptim/limits/penalty.py	83.53% <100.00%> (+0.16%)	:arrow_up:
bioptim/limits/penalty_option.py	83.04% <100.00%> (+0.04%)	:arrow_up:
...ptim/optimization/receding_horizon_optimization.py	95.98% <100.00%> (ø)
bioptim/dynamics/dynamics_functions.py	84.29% <0.00%> (ø)
bioptim/interfaces/stochastic_biorbd_model.py	32.35% <33.33%> (+0.09%)	:arrow_up:
bioptim/dynamics/ode_solver.py	85.20% <81.81%> (-2.24%)	:arrow_down:
bioptim/optimization/solution.py	79.23% <0.00%> (-0.51%)	:arrow_down:
... and 4 more

... and 3 files with indirect coverage changes

:loudspeaker: Thoughts on this report? Let us know!.

[EveCharbie]

@pariterre can be merged :)