Please create Stage 1 float16 repo

[petamoriken]

@leobalter The W3C ColorWeb CG suggests adding Float16Array to ECMAScript, and prototyping it in browsers.

https://lists.w3.org/Archives/Public/public-colorweb/2022Dec/0014.html

[bakkot]

@ljharb Float16 is already a stage 1 proposal per https://github.com/tc39/proposals/blob/main/stage-1-proposals.md. This is a suggestion for adding a repository for it.

[bakkot]

I have gone ahead and made a repo for this, and written the (very small) spec text, so we have space to track it. I've linked ColorWeb CG's proposal in the motivation section.

The proposal itself is very little spec text, so if someone is able to bring it to committee in March and the committee is convinced of the use case I think it could advance quickly. If no one else is able to I would be willing to bring it myself, although I'm not very familiar with the space.