Plugin request for Buf Schema Registry: grpc-mcp-gateway

## Mandatory **Where is the source code for the plugin?** https://github.com/linkbreakers-com/grpc-mcp-gateway/tree/main/cmd/protoc-gen-mcp-gateway **Does the plugin have a valid semver version?** Yes. Latest version is v0.4.0, taken from the git tags in the repository: https://github.com/linkbreakers-com/grpc-mcp-gateway **Does the plugin have a dependency on another plugin?** Yes. The generated code references types from the proto file being compiled (e.g. HelloRequest, GreeterClient), which means it depends on the output of `protoc-gen-go` and `protoc-gen-go-grpc`: - https://github.com/protocolbuffers/protobuf-go/tree/master/cmd/protoc-gen-go - https://github.com/grpc/grpc-go/tree/master/cmd/protoc-gen-go-grpc **Does the output of this plugin depend on any other external libraries?** Yes. The generated code imports two runtime dependencies: 1. github.com/linkbreakers-com/grpc-mcp-gateway/runtime the gateway runtime (decode/encode helpers) 2. github.com/modelcontextprotocol/go-sdk/mcp the MCP Go SDK