Moved Prism.js from the browser to the Cloudflare Pages Functions Middleware. Less main thread blocking on user devices!

#indieweb #webperf

@segedacz Prism.js was the last thing, except my Web Components and Cloudflare Turnstile, that I had on my blog, so I didn't have the need. I would first try to remove those things and the deal with the necessary evil. :)