Make web playground reference spec

switch to flakes; fix flatten action

Remove unneeded add in docs

Update sample in README to use println instead of print, ignore
srht.site data

Final formatting (last commit today I swear)

Stdin, minor error message tweak

stdin, forever loops

Improve web playground experience

Illusion of speed for web playground.

Use println in web playground

Add math, println

Add loop example in docs

Carriage return escapes

Fix tests, allow for windows crlf

Remove alert() because srht.site doesn't like it

Add WASM check

Target blank for links on web playground

Web-ready!

WASM done

Switch from rug to malachite because WASM