* new proto types for proposal info
* new proposal type
* nits
* lane input
* lint
* feat(ABCI): Deprecating `CheckOrderHandler` with new Proposal MetaData (#127)
* refactor without checkorder
* nits
* more nits
* lint
* nits
* feat(ABCI): Updating MEV lane to have no `CheckOrder` handler + testing (#128)
* updating mev lane
* nits
* preventing adding multiple bid txs in prepare
* update