Move as many as possible responsibilities of Tendermint from the validator crate to the Tendermint crate.

[nibhar]

This means some signifcant refactoring to the TendermintOutsideDeps and the TendermintState. In particular, but not limited to:

• [ ] Move the aggregation logic such that the state can reflect changes to aggregations.
• [ ] Move the message dispatching to aggregations, so the state can reflect a message log.