Function decode_and_render 

pub fn decode_and_render(
    buf: &[u8],
    schema: Option<&ParsedSchema>,
    annotations: bool,
    indent_size: usize,
) -> Vec<u8> 

Decode raw protobuf binary and render as protoc-style text in one pass.

Writes the #@ prototext: protoc\n header followed by field lines directly into a pre-allocated Vec<u8>.

Parameters mirror format_as_text in lib.rs.