Implement various interactives into Field Guide

[eAlasdair]

The new interactives should be recreated in JS/CSS ready for the new chapter content

• [ ] Classification Trees
• [x] Data Bias (@courtneycb)
• [x] Data Representation (@eAlasdair)
• [ ] Data Size
• [ ] Data Velocity (Data Drop)
• [ ] Software Engineering (Bakery Simulator) (@courtneycb)

[courtneycb]

Software Engineering needs new graphics created for it. Unsure who will be doing this yet.