tab: tabulate observations per observer & per identifier

[michaelpirrello]

As discussed, migrate

• ,maverick
• ,topids and
• ,topobs

customcoms into Dronefly commands

[synrg]

I'm going to cover ,topids and ,topobs in this bug. please file a separate one for ,maverick, as that's something entirely different, where individual identifications should be output, something we don't even have a display for yet.

The ,topobs customcom produces a URL from the taxon id argument like this:

https://www.inaturalist.org/observations?place_id=any&taxon_id={0:query}&view=observers

The ,topids customcom produces a URL from the taxon id argument like this:

https://www.inaturalist.org/observations?place_id=any&taxon_id={0:query}&view=identifiers

My idea is that these two are both best implemented as ,tab displays, where per observer and per identifier (different lists of iNat user ids, with numbers beside them) are the tabulated rows. We'd probably want abbreviations for these: per user and per ider, respectively (where user elsewhere in bot displays is already used to describe "the observer", e.g. in ,tab <taxon> by me).

So, for example:

,tab cuckoo bees from ns per user

Output should be like ,tab cuckoo bees from ns by me, except:

• the people listed don't have to be registered to the bot as members of the server
• no reaction buttons are provided to add/remove anyone
• the list could be rather long, so output would be paged if some reasonable maximum is exceeded
• the title would be "Observations of Subfamily Nomadinae (Cuckoo Bees) from Nova Scotia, CA per observer", which would be a link to the URL that the ,topobs customcom currently produces

,tab cuckoo bees from ns per ider

Just like the first example, except "per identifier" in the title & URL, and in the listed users in the table.