Missing TypeScript Type Declaration

[egalli]

In order to be able to use WebNN from TypeScript, WebNN needs a .d.ts type declaration file.

WebGPU uses a set scripts and manual changes under https://github.com/gpuweb/types/. This repository gets published under @webgpu/types.

I propose that we create a similar repository for WebNN. I have created a starting point
on https://github.com/egalli/webnn-types-example/ that WebNN could adopt under the webmachinelearning org. The webnn-types-example project is based on the WebGPU repository plus a few changes to make it compatible with newer versions of TypeScript and some oddities in the tsc compiler.

[anssiko]

@egalli, thanks for this proposal, looks very useful and relevant. I will bring this to our upcoming meeting for discussion.

I assume you'd be willing to contribute your starting point to the group. The likely home would be the WebML CG that is chartered to take on this type of work. I also assume you'd be in a position to join the WebML CG that makes this type of contribution possible. I also assume you'd be interested in continuing to maintain this project, but are looking for interested community participants to help you. Let us know if any of these assumptions are not correct.

[egalli]

Sounds good to me.

[bbernhar]

FYI, this issue was encountered upon enabling MLBuffer in a WebNN EP.