Vendor raptor source files (was embedded gitlink)

Tree vendored at upstream 0019c5dd; origin + license recorded in
raptor/VENDOR.txt. Windows SDL dev packages excluded via .gitignore.

raptor/pkg/osx/raptorlauncher/ViewController.h

@@ -0,0 +1,14 @@
+//
+//  ViewController.h
+//  raptorlauncher
+//
+//  Created by skynettx on 17.04.23.
+//
+
+#import <Cocoa/Cocoa.h>
+
+@interface ViewController : NSViewController
+
+
+@end
+