docs: update for node v0.20.x

[jcstein]

1. Use height instead of header in share module API: !refactor(api/share): use height in share module celestia-node#3870
2. Update existing cmds:
   1. https://docs.celestia.org/tutorials/node-tutorial#advanced-example
   2. https://docs.celestia.org/tutorials/node-tutorial#combined-commands
3. Update node tutorial for new types from https://github.com/celestiaorg/celestia-node/releases/tag/v0.19.0-arabica

[jcstein]

makes sense, thanks! and in this feature, if there are no blobs, empty vector is returned? is there anything else that changes from a user perspective?

Originally posted by @jcstein in celestiaorg/celestia-node#3223 (comment)

cc @vgonkivs for help on UX changes