Merge gpl2 into main

[rickstaa]

User story

I found several problems during the robustness evaluation that need to be fixed.

• Robustness eval utility link not working (see https://rickstaa.github.io/bayesian-learning-control/control/eval_robustness.html codeblock).
• Check out the documentation page on the Test Policy utility for how to handle this situation message that is thrown when an error exists in the model is not formatted correctly.
• Simzoo import goes wrong in disturbance evaluation. It doesn't find bayesian_learning_control.simzoo.
• No default disturbance type.
• Disturbance list lists the wrong types! No disturbance needed it is just combined, input and output
• We don't need the baseline everytime (eval_robustness)
• Wrong environment is trained!
• Add recursive impulse disturbance.
• Add impulse length variable.
• Add the ability to overload action_space min and max (otherwise clipping occurs during the robustness evaluation).

[rickstaa]

Al these issues were fixed in fb486e8.