Allow to use Buffer nodejs api inside napa workers

[darky]

In this list Buffer api not exists https://github.com/Microsoft/napajs/blob/master/docs/api/node-api.md

But would be cool to have it.

[fs-eire]

Improving node API compatibility (such as to support Buffer) is what we are currently working on.

Some features are just simple to support in Napa - those are implemented in pure javascript, or wrappers of independent native modules. Some others are not that easy to support - such as setImmediate/setTimeout. We usually need to make some updates to Napa core modules. Buffer may be one of those most difficult to support. In order to handle those ones, a lot of things need to be updated - memory management, module loader, event loop and so on.

So, we will support Buffer, but this is not likely to happen soon. We are still on the way.

[nveenjain]

can we use node zone to support functionalities of buffer? If so how? BTW, kudos to you guys, this runtime is like dream come true.