Add WAForth to Systems page

[remko]

Hi,

I'm the author of WAForth. Would it be possible to get WAForth listed on the Systems page of forth-standard.org?

Here's a suggestion for the entry:

[WAForth](https://github.com/remko/waforth) | WebAssembly |     | Bootstrapping dynamic Forth Interpreter/Compiler for & in WebAssembly 

[ruv]

The web-page https://forth-standard.org/systems is automatically generated from the wiki web-page https://github.com/ForthHub/wiki/wiki/Forth-Systems that is publicly editable.

As I can see, you have already included WAForth into the list :)

[remko]

Great, thanks!