adding gfx and ui stuff

gfx/world/camera.h

@@ -0,0 +1,21 @@
+#ifndef DJSTDLIB_GFX_CAMERA_H
+#define DJSTDLIB_GFX_CAMERA_H
+
+#include "../../core.h"
+#include "../../vendor/raymath.h"
+
+typedef struct Camera Camera;
+struct Camera {
+    Matrix view;
+    Matrix proj;
+    Vec3 pos;
+    Vec3 up;
+    Vec3 target;
+};
+
+Camera createCamera(int32 width, int32 height);
+void cameraSetAspect(Camera *c, int32 width, int32 height);
+void cameraLookAt(Camera *c, float x, float y, float z);
+void cameraSetUp(Camera *c, real32 up_x, real32 up_y, real32 up_z);
+
+#endif