Protobuf improvements and cleanups

[Nana-EC]

Story Form

As a block node engineer and Block Node API consumers
I want to have a clean and up to date protobuf specification of the API
So that there's clarity around capability

Technical Notes

In chore: Setup local copies of block node protobuf we proposed a new layout for the protobuf to allow for self management in the block node repo.
There was some valuable feedback that we wanted to address in follow up

• chore: Setup local copies of block node protobuf #891 (comment)
• chore: Setup local copies of block node protobuf #891 (comment)
• chore: Setup local copies of block node protobuf #891 (comment)
• chore: Setup local copies of block node protobuf #891 (comment)
• chore: Setup local copies of block node protobuf #891 (comment)
• chore: Setup local copies of block node protobuf #891 (comment)
• chore: Setup local copies of block node protobuf #891 (comment)
• chore: Setup local copies of block node protobuf #891 (comment)
• chore: Setup local copies of block node protobuf #891 (comment)
• chore: Setup local copies of block node protobuf #891 (comment)