move sunshine to src

- this will allow for common cpp workflow files within org

src/platform/macos/av_img_t.h

@@ -0,0 +1,18 @@
+#ifndef av_img_t_h
+#define av_img_t_h
+
+#include "src/platform/common.h"
+
+#include <CoreMedia/CoreMedia.h>
+#include <CoreVideo/CoreVideo.h>
+
+namespace platf {
+struct av_img_t : public img_t {
+  CVPixelBufferRef pixel_buffer   = nullptr;
+  CMSampleBufferRef sample_buffer = nullptr;
+
+  ~av_img_t();
+};
+} // namespace platf
+
+#endif /* av_img_t_h */