Fixes namespace and angle calculations

Corrects namespace naming from unity_engine to unreal_engine.

Adjusts projectile prediction and angle calculations for accuracy
in Unreal Engine environments.

source/engines/unreal_engine/formulas.cpp

@@ -46,4 +46,4 @@ namespace omath::unreal_engine
                 {0, 0, -1.f, 0},
         };
     }
-} // namespace omath::unity_engine
+} // namespace omath::unreal_engine

source/engines/unreal_engine/traits/camera_trait.cpp

@@ -24,4 +24,4 @@ namespace omath::unreal_engine
     {
         return calc_perspective_projection_matrix(fov.as_degrees(), view_port.aspect_ratio(), near, far);
     }
-} // namespace omath::unity_engine
+} // namespace omath::unreal_engine