Created Icon interface

artist/icon.go

@@ -0,0 +1,14 @@
+package artist
+
+import "image"
+import "image/color"
+import "git.tebibyte.media/sashakoshka/tomo/canvas"
+
+type Icon interface {
+	// Draw draws the icon to the destination canvas at the specified point,
+	// using the specified color (if the icon is monochrome).
+	Draw (destination canvas.Canvas, color color.RGBA, at image.Point)
+
+	// Bounds returns the bounds of the icon.
+	Bounds () image.Rectangle
+}