feat: Reliable Peer Discovery (#408)

* feat(swap): Allow discovery at multiple rendezvous points, request quotes from locally stored peers

- Ensure uniqueness of the peer_addresses table (no duplicate entries)
- Add peer to local database even if we just request a quote, and no swap (call to list_sellers)
- Refactor list_sellers to take multiple rendezvous points
- Allow db to be passed into list_sellers, if so request quote from all locally stored peers

* feat: editable list of rendezvous points in settings, new maker box on help page

* Recover old commits

* fix small compile errors due to rebase

* amend

* fixes

* fix(gui): Do not display "Core components are loading..." spinner

* fix(gui): Prefer makers with m.minSwapAmount > 0 BTC

* feat(cli, gui): Fetch version of maker

* feat: display progress bar

src-gui/src/utils/sortUtils.ts

@@ -19,6 +19,8 @@ export function sortMakerList(list: ExtendedMakerStatus[]) {
           (m) => (m.relevancy == null ? 1 : 0),
           // Prefer makers with a higher relevancy score
           (m) => -(m.relevancy ?? 0),
+          // Prefer makers with a minimum quantity > 0
+          (m) => ((m.minSwapAmount ?? 0) > 0 ? 0 : 1),
           // Prefer makers with a lower price
           (m) => m.price,
         ],