Creating .proto definition subdomains.

[tegefaulkes]

Specification

We need to update the protobuf definitions to split up messages for each domain into its own domain .proto file. we can use package names and imports to achieve this.

Additional context

Relates to #249

Tasks

• Prototype by abstracting into subdirectories under src/proto/schemas, and integrate google's protobuf library by first referencing it and then just copying verbatim
• Create common domain types and common message types and share between Client.proto and Agent.proto

[CMCDragonkai]

Remember to assign yourself here and put it in right column too.

Also I think tick boxes for issues should only relate to the issue, other items go to the PR.

[CMCDragonkai]

Also I noticed this issue didn't have the labels automatically applied. Did you create the issue on github?

[tegefaulkes]

I think I created it from a task list in the related issue.

[CMCDragonkai]

Yea if aren't directly creating issues, make sure to add the appropriate labels and metadata.