aquatics scores/forecasts catalog info

[cboettig]

Scores.json and forecast.json need:

• an asset element showing how to open the entire collection (for all model ids)
• Nice description text.
• Consider having some kind of thumbnail icon on both 'scores' and 'forecasts'
• forecasts.json and scores.json should be entered as a child catalog, not an item. This will let them each have a bit more metadata and maybe display more nicely.

e.g. though this links to both forecasts and scores, it isn't particularly inviting

https://radiantearth.github.io/stac-browser/#/external/raw.githubusercontent.com/eco4cast/neon4cast-catalog/main/stac/aquatics/scores/scores.json