Palette load/save

[LeStahL]

[palette]
name = "Candy Bar"
image = "candy.png"
id = "cmap_candy_bar"
colors = [
    [0,0,0],
    [0.3, 0.5, 0.7],
    [1,1,1],
]

[gradient]
weight = "oklab"
mix = "cielab"

[cmap]
accuracy = 150
horner_order = 7

[copy]
what = "cmap_function"
language = "glsl"