Function generate_ruby_protobuf 

pub fn generate_ruby_protobuf(
    schema: &ProtobufSchema,
    target: &ProtobufTarget,
) -> Result<String>

Generate Ruby Protobuf code from a schema

Parses the Protobuf schema and generates idiomatic Ruby code with message classes, service clients, and server implementations based on the target specification.

Arguments

• schema - Parsed Protobuf schema
• target - Generation target: ProtobufTarget::All (complete), ProtobufTarget::Messages (messages only), or ProtobufTarget::Services (services only)

Returns

Generated Ruby code as a string, or an error if generation fails