feat(swap): Use art_client to dial over Tor (#196)

- Upgrade `sqlx` to `0.8`
- Use `arti_client@0.24` in combination with [`libp2p-community-tor`](https://crates.io/crates/libp2p-community-tor/0.4.1). https://github.com/umgefahren/libp2p-tor/pull/18 was required for this.
- Display spinner in GUI while Tor circuits are being established
- Remove unused dependencies (`once_cell`, `tauri-plugin-devtools`, `digest`, `hyper`, `itertools`, `erased_serde`)
- Bundle roboto font from npm registry

swap/src/cli.rs

@@ -4,6 +4,7 @@ pub mod cancel_and_refund;
 pub mod command;
 mod event_loop;
 mod list_sellers;
+mod tor;
 pub mod transport;
 pub mod watcher;
 
@@ -45,7 +46,7 @@ mod tests {
             rendezvous_peer_id,
             rendezvous_address,
             namespace,
-            0,
+            None,
             identity::Keypair::generate_ed25519(),
         );
         let sellers = tokio::time::timeout(Duration::from_secs(15), list_sellers)