feat: Add Krita config

Krita/data/gradients/GPS-Nature-Pure-greens.ggr

@@ -0,0 +1,6 @@
+GIMP Gradient
+Name: GPS Nature Pure greens
+3
+0.000000 0.188942 0.321738 0.406805 0.613636 0.276136 1.000000 0.324169 0.454545 0.114714 1.000000 0 0 0 0
+0.321738 0.476951 0.632164 0.324169 0.454545 0.114714 1.000000 0.152941 0.215686 0.090196 1.000000 0 0 0 0
+0.632164 0.816082 1.000000 0.152941 0.215686 0.090196 1.000000 0.000000 0.039216 0.000000 1.000000 0 0 0 0