Document details about the usage of *common.proto* and *config.yaml*. Specially give use cases about options `protoPaths` and `protoFiles`. Related issue: https://github.com/tableauio/tableau/issues/125
Document details about the usage of common.proto and config.yaml. Specially give use cases about options
protoPathsandprotoFiles.Related issue: tableauio/tableau#125