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/main.m

@@ -0,0 +1,15 @@
+//
+//  main.m
+//  raptorlauncher
+//
+//  Created by skynettx on 17.04.23.
+//
+
+#import <Cocoa/Cocoa.h>
+
+int main(int argc, const char * argv[]) {
+    @autoreleasepool {
+        // Setup code that might create autoreleased objects goes here.
+    }
+    return NSApplicationMain(argc, argv);
+}