Add debug syncing commands for dymint

[omritoptix]

The following cli command should reveal:

• [ ] height of last block received from p2p
• [ ] height of last block received from da
• [ ] last block applied source (da or gossip)
• [ ] number of accumulated blocks pending to be applied (cache occupancy)
• [ ] height of lowest block pending in cache
• [ ] height of highest received block

[zale144]

closing in favor of https://github.com/dymensionxyz/dymint/issues/978