New Shape-method which takes position and calcs the uvs depending on the shape

RayTracer/shape/Shape.h

@@ -10,6 +10,8 @@ namespace shapes {
 class Shape {
    public:
 	virtual std::optional<cam::Hit> intersect(const cam::Ray& r) const = 0;
+	virtual std::pair<float, float> texture_coordinates(
+	    const util::Vec3& pos) const = 0;
 	virtual util::AxisAlignedBoundingBox bounds() const = 0;
 };
 }  // namespace shapes
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