The current installation instructions are potentially confusing, more so for the users who need the help most (typically Windows ones).

We have a lot of ways to install RGBDS; in no particular order:

• Homebrew on macOS
• Pacman on Arch Linux
• Docker (if you have that installed)
• Building from source...
  • ...using a downloaded .zip or Git clone
  • ...getting prerequisites with your Linux/WSL package manager, macOS brew, or (most complicated) Cygwin
  • ...using make or cmake
    • ...plus more variants for old cmake versions
  • ...and how to add it to PATH for Windows
    • ...with cmd or Powershell
• Using rgbenv (which has its own build instructions)
• Another page on how to use the master development branch...
  • ...building from source (semi-redundant)
  • ...Pacman on Arch Linux
  • ...the CI builds (are these even worth officially promoting? especially given that "We only recommend doing this on Windows", but IMO shouldn't recommend something for Windows users that takes them to a page like this)

I think we should prioritize using the releases published on GitHub (with a separate page for Windows users explaining how to add the new .exe files to their PATH).

Secondly, mention the packaged options for macOS and Arch Linux.

Thirdly, a separate page on how to build from source. This would have sections on how to install the prerequisites (with apt, pacman, brew, Cygwin, etc), get the source (download the .zip or git clone), build (make or cmake), and install (make install or adding to PATH).