Would having a group parameter in show be good?

[Insomniak47]

So for example:

> peer show --group author

Id   Title                                    💬    🚧  Url
--- Dependabot -----------------------------------
27   chore(deps): update dependency system.t… 0/0   🚩  https://github.com/wakawaka/doot/pull/27
26   chore(deps): update dependency others.t… 0/0   🚩  https://github.com/wakawaka/floop/pull/27
--- Insomniak47 (Or maybe @you) ------------------
119  feat: intial shot at the details command 3/14  🚩  https://github.com/wareismymind/peer/pull/119
--- slagr00m -------------------------------------
13   feat: Write cool stuff to  kafka         8/15  🚩  https://github.com/florp/maw/pull/13
[...]

Would be nice in combo with filters #95, #15

Might require a rewrite of the (really naive) way we're doing things rn. in terms of writing things. Might also make it easier to handle the different symbol width problem as well