Adding an icon in the database and collection next to the ‘+’ sign for “Query database with MongoDB Copilot”. We can open a Copilot chat with @MongoDB populated and we should show a message from the MongoDB participant saying "Ask any questions about <X> database" or "Ask any questions about <X> database's <Y> collection" if navigated from a collection. 

Additionally, we should also add an icon for Playgrounds here for so users can directly jump to Playgrounds from the connection tree. If users are navigating at the DB level, we can pre-populate playgrounds with `use(<DB_Name>);` and if they are clicking from the collection level, we can additionally include a simple db.<collection_name>.findOne().