Document owned protobuf files

[smuu]

Document protobuf files in ./rollkit and ./dalc

make proto-lint should not return anything when the following types are disabled in buf.yaml.

    - COMMENT_MESSAGE
    - COMMENT_RPC
    - COMMENT_ENUM
    - COMMENT_ENUM_VALUE
    - COMMENT_SERVICE

make proto-lint

docker run --rm -v ./:/workspace --workdir /workspace bufbuild/buf lint --error-format=json

buf.yaml

``` version: v1beta1

build: roots: - proto - third_party/proto lint: use: - DEFAULT - COMMENTS - FILE_LOWER_SNAKE_CASE except: - COMMENT_FIELD - PACKAGE_VERSION_SUFFIX - RPC_REQUEST_STANDARD_NAME - SERVICE_SUFFIX - UNARY_RPC ignore: - tendermint breaking: use: - FILE

</details>

Note: Once this is implemented remove the types from the configuration so that the CI linter can scan for those types again.