Add in control panel sidebar on left side

[jonfroehlich]

For landscape generator, sound vis, and other things, would be nice to have a control panel on left side.

Some of Mike Freeman's work has this such as Triangulate (GitHub), which appears to be in React using Material-UI, however.

[jonfroehlich]

So, in researching this, some helpful links:

• https://github.com/processing/p5.js/wiki/Beyond-the-canvas
• Attaching p5js sketch to canvas: https://p5js.org/examples/instance-mode-instance-container.html
• https://rainbowsprinklecode.wordpress.com/2017/03/02/html-css-and-the-dom-with-p5-js/