Proc macro preparation

simconnect-sdk/src/errors.rs

@@ -0,0 +1,15 @@
+use thiserror::Error;
+
+#[derive(Error, Debug)]
+pub enum SimConnectError {
+    #[error("SimConnect error: {0}")]
+    SimConnectError(i32),
+    #[error("SimConnect unrecognized: {0}")]
+    SimConnectUnrecognizedEvent(u32),
+    #[error("Object `{0}` has already been registered")]
+    ObjectAlreadyRegistered(String),
+    #[error("Conversion error: {0}")]
+    ConversionError(#[from] std::num::TryFromIntError),
+    #[error("Unexpected error: {0}")]
+    UnexpectedError(String),
+}