Hippolyte Verninas

### Checks before merging PR - [ ] added documentation for any new feature - [ ] added unit test - [ ] edited the [what's new](../../whatsnew.rst) (if applicable)

### Checks before merging PR - [ ] added documentation for any new feature - [ ] added unit test - [ ] edited the [what's new](../../whatsnew.rst) (if applicable)

ENH separate solver logs

1

This PR add separate logs for the solvers, saved in outputs/logs. While the main stdout only reports the status ### Checks before merging PR - [ ] added documentation for...

ENH better control for random seed

1

Users can now set a seed in the CLI, which will set a global seed to the benchmark (a random one is chosen if none specified). ### Checks before merging...

We should have more options to customize the matplotlib plots (scale, etc)