docs: updates for nitro

[jcstein]

Tasks

Beta Give feedback

1. update contract addresses
2. update links to new version
3. change prefix to 0x63
4. remove websocket connections for batch poster
5. config changes: rm: is-poster, event-channel-size; validator optional, needs tmint rpc; poster no longer needs special stuff
6. add configurable fallback to anytrust, other DA, etc. this is helpful if you plan on having high throughput and cannot fall back to ETH because blobs are too big
7. 3.0.0 enables stylus - add on overview page 058fc1e9
8. blobstream x happens when there is a fraud proof. if there is fraud, whoever submitted the fraud proof has to submit another proof that contains proof the batch data was committed to by Blobstream
9. add da server for celestia-node - WIP by Diego
10. update deployment portal after new contracts are ready
11. review contract addresses

[jcstein]

moved a task not critical to this PR to a new issue #1627