include the p5.colorGenerator library

Author: Alex Postolache

src/content/libraries/en/p5.colorGenerator.yaml

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+name: p5.colorGenerator
+category: color
+description: p5.colorGenerator generates harmonious color schemes by starting from a given base color or selecting a random color as a starting point.
+author:
+- name: Alex Codes Art
+  url: https://alexcodesart.com
+sourceUrl: https://github.com/alexandru-postolache/p5.colorGenerator
+websiteUrl: https://alexandru-postolache.github.io/p5.colorGenerator/demo
+featuredImage: "../images/p5.colorGenerator.png"
+featuredImageAlt: Waves coloured using different tints of yellow