Platform Services: Document roles associated with the pre-defined teams

## Jobs to be done (optional)

## Definition of done
- Use the i[nfo here](https://kongstrong.slack.com/archives/C04RXLGNB6K/p1771556480585809?thread_ts=1771289798.500209&cid=C04RXLGNB6K) to add the roles that make up the predefined teams here https://developer.konghq.com/konnect-platform/teams-and-roles/#teams
- There are also special roles  RootReadOnly and Root that are missing on our doc

## Information
Slack: https://kongstrong.slack.com/archives/CDSTDSG9J/p1772054827259189

## Due date (optional)

## Size
S

Open the linked teams-and-roles documentation page and review the roles information in the referenced Slack thread. Document the roles associated with each predefined team, and include the special RootReadOnly and Root roles; the page should clearly list all requested roles when done.

Written by the indexing model from the issue text.