export some builtin traits,

brightness conversion fails for invalid values,

macros for wrapping attrs

src/errors.rs

@@ -4,4 +4,6 @@ pub enum ServicePointError {
     IoError { error: String },
     #[error("The specified brightness value {value} is out of range")]
     InvalidBrightness { value: u8 },
+    #[error("The provided packet is invalid or a conversion to packet failed")]
+    InvalidPacket,
 }