Built the eclair.computer website

Spent a bunch of time this weekend putting the website for ECLair together. Up until now all of the documentation was a mix of files in the git repository, one wiki page on my projects wiki, and various Google Sheets, and it was starting to slow down design progress having to find the right documentation each time I needed to remember what the data paths were between two random registers. I figured I might as well organize all the documentation to be a bit more public while I was at it, so this site seemed the best way to go.

Also put together an up-to-date architecture diagram, since the previous one was 5 years old now. New one is easier to read and has 5 years worth of changes in it, things are a lot further along now!