Incremental updates for .zip packaged actions

Consider Node.js-based actions that gets created/uploaded to OW with the cmdline tool as a .zip file (including all the required NPMs).

It would be useful for development purposes if that action could be updated without having to repackage the modified action and upload all the NPMs again.

Reason: the NPM dependency chain cn be quite large even for simple NPMs. Having to re-upload these NPMs even when only the action code has changed makes the overall development process much slower. Actually, _without_ having to upload NPMs developing on OW is quite speedy, almost like ctrl-s/crtl+r. However, the upload time really kills the flow for me - hence the feature request.