Publish an asset with

[r-marques]

Create a simple tutorial about publishing an asset:

1. Instantiate nevermined
2. Login to nevermined
3. Price an asset or make it free
4. Publish the asset
5. Check the owner of the asset
6. The owner should be able to download the asset

Reference: https://github.com/nevermined-io/sdk-js/blob/main/integration/nevermined/ConsumeAssetViaNode.test.ts