[orx-color, orx-fx] turbo_colormap and spectral_zucconi6 provided as shader phrases (#338)

orx-fx/src/jvmDemo/kotlin/DemoColormapGrayscale.kt

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+import org.openrndr.application
+import org.openrndr.draw.ColorType
+import org.openrndr.draw.createEquivalent
+import org.openrndr.draw.loadImage
+import org.openrndr.extra.fx.colormap.GrayscaleColormap
+import kotlin.math.sin
+
+fun main() {
+    application {
+        program {
+            val colormap = GrayscaleColormap()
+            val image = loadImage("demo-data/images/image-001.png")
+            val colormapImage = image.createEquivalent(type = ColorType.FLOAT32)
+            extend {
+                colormap.curve = 1.0 + sin(seconds) * .5
+                colormap.apply(image, colormapImage)
+                drawer.image(colormapImage)
+            }
+        }
+    }
+}

orx-fx/src/jvmDemo/kotlin/DemoColormapSpectralZucconi.kt

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+import org.openrndr.application
+import org.openrndr.draw.ColorType
+import org.openrndr.draw.createEquivalent
+import org.openrndr.draw.loadImage
+import org.openrndr.extra.fx.colormap.SpectralZucconiColormap
+import kotlin.math.sin
+
+fun main() {
+    application {
+        program {
+            val colormap = SpectralZucconiColormap()
+            val image = loadImage("demo-data/images/image-001.png")
+            val colormapImage = image.createEquivalent(type = ColorType.FLOAT32)
+            extend {
+                colormap.curve = 1.0 + sin(seconds) * .5
+                colormap.apply(image, colormapImage)
+                drawer.image(colormapImage)
+            }
+        }
+    }
+}

orx-fx/src/jvmDemo/kotlin/DemoColormapTurbo.kt

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+import org.openrndr.application
+import org.openrndr.draw.ColorType
+import org.openrndr.draw.createEquivalent
+import org.openrndr.draw.loadImage
+import org.openrndr.extra.fx.colormap.TurboColormap
+import kotlin.math.sin
+
+fun main() {
+    application {
+        program {
+            val colormap = TurboColormap()
+            val image = loadImage("demo-data/images/image-001.png")
+            val colormapImage = image.createEquivalent(type = ColorType.FLOAT32)
+            extend {
+                colormap.curve = 1.0 + sin(seconds) * .5
+                colormap.apply(image, colormapImage)
+                drawer.image(colormapImage)
+            }
+        }
+    }
+}