Big Content Update

Hey everyone! Just made a big content update to the book. Changes include:

• About triple the content (43 pages -> 137 pages)
• Rewrite and reorganization of all existing chapters to be a lot more readable/understandable
• Inclusion of common errors to look out for
• Added chapter about OOP/classes
• Addition of interactive exercises
• Revamped look (created a new build pipeline to generate a nice looking pdf from markdown instead of using Google Docs)

If you end up reading it, let me know what you think in the community posts - thanks!