Update visual test of shaders. Toon shade using Shader Graph.

A toon shader was created using Shader Graph. It has been tested on a (free) model. The shader reacts to light in both color and direction. It includes a Fresnel effect, which allows modifications to its intensity, angle, and color. Additionally, it features a gloss effect with the same adjustable properties as the Fresnel effect. The gradient used in the toon shader is also customizable to achieve different color ranges and visual styles for the model.

Future Updates:

• Explore viable ways to combine the pattern script with the toon shader.
• Add original models to test the toon shader and outline, making adjustments based on their visual appearance.