Restructured the source code in the Playdate bindings target.

Sources/PlaydateKit/Playdate/Structures/PlaydateError.swift

@@ -0,0 +1,12 @@
+/// An error reported by the Playdate OS.
+public struct PlaydateError: Swift.Error, Sendable {
+    public let message: String
+
+    init(message: String) {
+        self.message = message
+    }
+
+    init(cString: UnsafePointer<CChar>?) {
+        self.init(message: String(playdateCString: cString) ?? "unknown error")
+    }
+}