Document how to wire up bambulab modules in lib.rs once messages exist

packages/rust-types/src/lib.rs

@@ -7,3 +7,18 @@ pub mod continuum {
 pub use continuum::v1::{
     MaterialProfile, PrintJob, PrintJobStatus, PrintParameters, Template,
 };
+
+// bambulab/*.proto currently have no messages (see proto/bambulab/), so
+// there's nothing for prost to emit yet — `include!` against a
+// nonexistent file would break the build. Once you've added real messages
+// to proto/bambulab/{common,v1/*,v2/*}.proto, add:
+//
+// pub mod bambulab {
+//     include!(concat!(env!("OUT_DIR"), "/bambulab.rs"));       // common.proto's messages
+//     pub mod v1 {
+//         include!(concat!(env!("OUT_DIR"), "/bambulab.v1.rs")); // request.proto + report.proto combined — same package
+//     }
+//     pub mod v2 {
+//         include!(concat!(env!("OUT_DIR"), "/bambulab.v2.rs"));
+//     }
+// }