Orderflow Data API

The [relay data API](https://flashbots.github.io/relay-specs/#/Data) was extremely successful at illuminating the mev-boost block market by enabling sites like [mevboost.org](https://www.mevboost.org/), [relayscan](https://www.relayscan.io/), and [many](https://mevboost.pics/) [more](https://app.metrika.co/ethereum/dashboard/mev/relay-overview?tr=1d). Let's enable something similar for mev-share!

There's really only so many options for what the underlying data allows us to present, but it's a useful exercise to come to an agreement on some design principles.

The list of potential actors interacting with mev-share to consider are:
- tx originators (signers)
- wallets
- dapps
- bundlers/paymasters (?)
- matchmakers
- builders
- sequencers

What should the dashboards that will soon fill our twitter feeds look like?