refactor(errors): adopt reportable error terminology

firmware/libs/kaptan-err-reportable-macros/tests/ui/union.rs

@@ -0,0 +1,8 @@
+use kaptan_err_reportable_macros::KaptanError;
+
+#[derive(KaptanError)]
+union NotAnError {
+    code: u8,
+}
+
+fn main() {}