Have only two shaders, one for simple gradient and the other for dithered gradient generation. The gradient shape gets passed as a uniform to the shader. Gradients can now get repeated, and the size option for linear gradients is back.
Gradients are no longer limited to two colors, but can now instead have as many as we want, with each color having its own offset. Step gradients have now been removed; to generate the same effect, you can now generate a linear gradient with constant interpolation. Cubic interpolation in gradients is now also possible.
The dithering shaders were by far the biggest challenge and they had to be re-written in order for them to support multiple colors, with each one having a difference offset. I have noticed that some colors may disappear when Constant interpolation is used, though, so it can be buggy sometimes. Thanks to https://godotshaders.com/shader/dither-gradient-shader/ for the reference.
ValueSliders are now also used in the gradient window.
