Upload progress for Nodejs

[AuHau]

It should be possible to stream the upload on NodeJS side and wrap that stream with Passthrough stream to track how much was already uploaded. With this we could have a progress tracking support.

A question is how to communicate this to the user that it is possible only on NodeJS? Maybe to use similar concept like data.ts vs data.browser.ts?

[agazso]

I think the most important is to emphasize in the documentation. Then depending on the implementation we may ignore the parameter for the progress tracking or throw an error when used in the browser.

[AuHau]

Currently, the upload progress is "supported" with work-around presented in the example https://github.com/ethersphere/examples-js/tree/master/upload-progress