Colors in dashboard should aim to be stable for resource

This would help the eye more quickly interpret traces and resource view, even of other Aspire apps.

I see two approaches
- Make color indicate type, eg., database. This would need a concept of integration type, eg., caching, blob storage, database, secret store, message queue etc in the configuration schema
- Simply make color stable for a particular resource from run to run and machine to machine. This could possibly be done more trivially by hashing the resource name and other stable identifying information.