Change default `num_steps` to 100 and tweak some config sets

This MR primarily addresses #258 (closed) by changing the default num_steps argument to 100 steps – this shows more interesting dynamics for most models.

In addition, some run and eval configurations are improved.

Is there something that needs to be double checked?

• Are there other parts of the documentation that need to be adapted?

Can this MR be accepted?

• Implemented the changes
• Adapted tests
• Checked test code coverage on new and adjusted code
• Added or updated documentation
• Reasonably up-to-date with current master
• Pipeline passing (with only a temporary linkcheck warning)
• History cleaned-up or squash option set
• Reviewed and approved

Related issues

Closes #258 (closed)