Update Some Things

[tomdaley92]

Updated some things to get the project in working order:

• Use latest SDL 2.x.x -> 2.32.10
• Update both build systems (makefiles)
• compile for Windows x64
• compile "universal binary" for MacOS x64 and ARM64
• Add GitHub Actions Workflows for building on both platforms
• Compile our own SDL binaries
• Cache SDL builds in GitHub Actions
• Upload builds with GitHub Actions
  • remove binaries from repo
• Add linting for style preferences
  • informational right now, until we refactor the entire codebase