ENH: add optional description for Irsa.list_collection results

A one liner summary, like we have for catalogues, would be really nice for the collections. This likely is an upstream issues first as we have this query cached on the server side.

```
In [1]: from astroquery.ipac.irsa import Irsa

In [2]: Irsa.list_collections(filter='euclid')
Out[2]:

collection
object
----------------------
euclid_DpdMerBksMosaic
euclid_ero

In [3]: Irsa.list_collections(filter='spherex')
Out[3]:

collection
object
---------------
spherex_qr
spherex_qr_cal
spherex_qr_deep
```

Start at the Irsa.list_collections entry point and compare its result handling with the existing catalogue summary behavior. Check whether the upstream query and server-side cache can provide descriptions; done means filtered collection results include an optional one-line description without breaking the current table output.

Written by the indexing model from the issue text.