fix: protocol frame parsing, add debug feature, refactor read logic

src/lib.rs

@@ -1,3 +1,16 @@
+/// Debug-only print macro. Only outputs when compiled with `--features debug`.
+#[cfg(feature = "debug")]
+#[macro_export]
+macro_rules! debug_println {
+    ($($arg:tt)*) => { println!($($arg)*) };
+}
+
+#[cfg(not(feature = "debug"))]
+#[macro_export]
+macro_rules! debug_println {
+    ($($arg:tt)*) => {};
+}
+
 pub mod channel;
 pub mod config;
 pub mod device;