Offer beacons - Githubissues

This PR includes the new beacon for more expressive querying.

[x] Change protocol to use a single swap address for all swaps. Every user effectively gets their own DEX address.
[x] Change protocol to use a specific beacon policy for every asset being offered. The asset name for the beacon specifies what asset is being asked for. This allows querying all swaps that are offering a specific asset (no matter what asset is being asked for) and also all swaps for a specific trading pair.
[x] Reorganize off-chain code to make testing compositions easier.
[x] Update CLI.
[ ] Update Readme.
[ ] Update GettingStarted.
[x] Update Benchmarks.
[ ] Update Changelogs.
[ ] Add Architectural Decision Record (ADR).

fallen-icarus / cardano-swaps