Initial TinyGo, JS/TS, Grain API docs about docs HOT 5 OPEN

@flaki sure:

Rust: Stable
Go: Beta
AssemblyScript: Beta
Grain: Beta
JS/TS: Preview
Swift: Preview

from docs.

@cohix @ospencer could you give me the up-to-date Status (stable/beta/preview/experimental etc.) and the short description of all the Runtime APIs? As seen in the docs right now. If the existing ones need updating, let me know, but I'm primarily interested in the new ones (Tiny Go, JS, Grain).

from docs.

(You can sub 'Alpha' for 'Preview' if you want to keep it consistent)

from docs.

Now this is another thing, it would be good to keep the ordering according to status consistent but that currently means rewriting all existing tabs manually, urgh. #27 can't come soon enough. Will try to look into that on Monday if i find the time.

from docs.

JS&TS has been bumped to beta status and initial Runnable API docs published as part of #57.

from docs.