refactor: move firmware workspace under firmware

firmware/libs/kaptan-mavlink/build.rs

@@ -0,0 +1,28 @@
+use std::path::PathBuf;
+
+fn main() {
+    let manifest_directory = PathBuf::from(std::env::var("CARGO_MANIFEST_DIR").unwrap());
+    let dialect = manifest_directory.join("definitions/kaptan.xml");
+    let config = manifest_directory.join("definitions/kaptan/config.xml");
+    let log = manifest_directory.join("definitions/kaptan/log.xml");
+    let error = manifest_directory.join("definitions/kaptan/error.xml");
+    let shutdown = manifest_directory.join("definitions/kaptan/shutdown.xml");
+    for definition in [&dialect, &config, &log, &error, &shutdown] {
+        println!("cargo::rerun-if-changed={}", definition.display());
+    }
+    println!("cargo::rustc-check-cfg=cfg(kaptan_has_messages)");
+    // The upstream generator conditionally emits derives for these optional
+    // ecosystem crates. Kaptan deliberately does not expose those incomplete
+    // features, so tell rustc the generated inactive cfgs are intentional.
+    println!("cargo::rustc-check-cfg=cfg(feature, values(\"serde\", \"arbitrary\", \"ts-rs\"))");
+    if std::env::var_os("CARGO_FEATURE_DIALECT_KAPTAN").is_some() {
+        let output_directory = std::env::var("OUT_DIR").unwrap();
+        let generated = mavlink_bindgen::generate(
+            mavlink_bindgen::XmlDefinitions::Files(vec![dialect]),
+            output_directory,
+        )
+        .unwrap();
+        mavlink_bindgen::emit_cargo_build_messages(&generated);
+        println!("cargo::rustc-cfg=kaptan_has_messages");
+    }
+}