Create protobuf for data shared between GCS/OBC

[atar13]

🚀 Feature

Define protobuf messages for data types that the GCS and OBC both interact with. These can include competition specific information such as the types of target colors, what information is tagged with a water bottle, data associated with classified targets, etc.

Additional context

See datatypes defined in the obcpp and gcs.

Also, check to see what kinds of C++ enums are generated. There are regular C enums and C++ enum classes . If the default behavior is not to generate enum classes, look into if it's possible.

[atar13]

These messages should live in protobuf repo and should be shared to each repo via git submobules.