Archive the site

Based on a discussion among @librasteve, @lizmat, @patrickbkr, @finanalyst - Our current plan is to disable this site, and curate some small number of quality examples for the main raku.org site.

@dontlaugh - It's OK to shut off the hosting/infra for this site - let me know when that's done, and I'll remove links to the site from raku.org.

Sorry about the churn!