[overborrowing] MAINT: collect status messages

[mmcky]

This PR collects status messages issued by compute_equilibirum and prints them at the end of iteration to return a cleaner output in the context of jupyter-book

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[mmcky]

@jstac this output looks a lot cleaner

https://6620cb2f2b5122149e6c5393--incomparable-parfait-2417f8.netlify.app/overborrowing#generating-solutions

Would you still like it suppressed or show the iterations as suggested here?

[jstac]

This is good, thanks @mmcky . Please merge when ready