* Migrate protobuf generation to Buf
Buf simplifies the generation story and allows us to lean
into other features in the Buf ecosystem, such as dependency
management, linting, breaking change detection, formatting
and remote plugins.
* Format all protobuf files with buf
Also add a CI job to ensure formatting remains consistent
* Add CI job to warn on proto generate diffs
Some files were not regenerated with the latest version
of the protobuf binary. This CI job will ensure we are always
detect if the protobuf files need regenerating.
* Add CI job for linting protobuf files