[Feature request] implement scenario_metadata color config on Envision

[qianyi-sun]

Proposal

The color set in the following code can be also visualized on Envision

    scenario=Scenario(
        traffic=traffic,
        ego_missions=ego_missions,
        scenario_metadata=ScenarioMetadata("Leader-007", Colors.Blue),
    ),
    output_dir=Path(__file__).parent,
)

Motivation

For some use case like following scenarios, users might want to clearly watch some actor(s) in the simulation. Allowing color config works on Envision might be good to improve user experience.

Alternatives

No response

Additional context

No response