UI Improvement: Display User Group 'Description' from Cognito in Amplify

**Is your feature request related to a problem? Please describe.**

Cannot find other issues.

**Describe the solution you'd like**

I will add 60+ organisations with Amplify group names such as "123123312" (from another source system). The management of these organizations will be done by an Admin from our customer. Thus I was hoping that the option to insert `group description` similarly as in Cognito backend would be possible.

As you can imagine, it's not easy to figure out what group is from just these vanity ID's

```
123123213
123213214
12332534
[60+]
```

This is what the current creation of groups looks like:


Also, I wish this info to be shown in the groups metadata listing, here, as a new column:


I think it's a pretty useful option for other usages similar as mine. Just the idea of having some simple metadata related to groups and editable in Amplify directly would be nice.

**Describe alternatives you've considered**

Adding the group descriptions from Cognito user pools, and only *displaying* them in Amplify (probably faster to implement for you). But still it's cumbersome for our end-user Admin.

**Additional context**

How group description is edited in Cognito user pools. This is where the group description is easily editable - but it's hard to teach our end-user Admin to use this

.

Start by reviewing the Amplify Studio group-creation flow and the groups metadata listing, then compare the available Cognito user-pool group description behavior. Done means group descriptions can be displayed in the creation flow and as a column in the metadata listing, with the supported editing scope clarified.

Written by the indexing model from the issue text.