[FEATURE] Support for all Copilot personas

[Richard-Weiss]

Since there are multiple personas that can be accessed by setting it in the optionSet, you could add the missing ones to the switch here in the NewSydney function. Possible personas are documented here in the #resolvePersona method.
You might want to consider decoupling tone and persona, because they are not directly dependent on each other i.e you can use the Sydney persona in Precise for example.