Function run 

pub fn run(
    schema_path: &str,
    output_dir: &str,
    package: &str,
    dialect_name: &str,
    formatter: &OutputFormatter,
) -> Result<()>

Run the generate-proto command.

Reads a compiled schema and writes three files to the output directory:

• service.proto — proto3 service definition
• vr_migrations.sql — row-shaped view DDL for the gRPC transport
• descriptor.binpb — serialized FileDescriptorSet for gRPC reflection

Errors

Returns an error if the schema cannot be loaded, the dialect is unknown, or the output files cannot be written.