String Constants Bikeshed #118

As discussed at the CG meeting today, it might yet be possible to specify a string constant for the ESM Integration.

Opening the bikeshed here for the current main suggestions, which I believe are:

• wasm:js-string
• wasm-js:strings

The slide on this topic is here for more details on the discussion.

@eqrion please let me know if I've got this correct or if there are changes or other suggestions that should be considered.

@conrad-watt I believe you had some more thoughts here from the presentation.

Suggestions / feedback very much welcome.