pre configure connection in settings

using a vs code dev container has proved useful in getting someone up and running quickly, especially with extension features like below, does vscode-mysql have such a thing?

https://github.com/Microsoft/vscode-mssql/wiki/manage-connection-profiles#edit-connections-in-the-user-settings-file

```
"mssql.connections": [
{
"authenticationType": "SqlLogin",
"server": "myservername",
"database": "optionalDbName",
"user": "MyUserName",
"password": "",
"savePassword": true
}
]
```

Start by reviewing the linked mssql connection-profile example and then trace how vscode-mysql currently handles connection settings. Done means users can preconfigure MySQL connections in the VS Code user settings, including the fields shown in the example.

Written by the indexing model from the issue text.