Add minimum viable product

Headers/CAState.h

@@ -0,0 +1,21 @@
+//
+//  CAState.h
+//  ScreenShredder
+//
+//  Created by Spotlight Deveaux on 2021-11-14.
+//
+
+#ifndef CAState_h
+#define CAState_h
+
+@import QuartzCore;
+
+@interface CAState : NSObject
+
+// We most likely don't need to define its methods, as we use none directly.
+// Instead, we define this solely for type checking.
+// (I apologize if you were looking for them here.)
+
+@end
+
+#endif /* CAState_h */