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/tests/harness/mod.rs

@@ -494,8 +494,6 @@ impl BobParams {
         swap_id: Uuid,
         db: Arc<dyn Database + Send + Sync>,
     ) -> Result<(cli::EventLoop, cli::EventLoopHandle)> {
-        let tor_socks5_port = get_port()
-            .expect("We don't care about Tor in the tests so we get a free port to disable it.");
         let identity = self.seed.derive_libp2p_identity();
 
         let behaviour = cli::Behaviour::new(
@@ -504,7 +502,7 @@ impl BobParams {
             self.bitcoin_wallet.clone(),
             (identity.clone(), XmrBtcNamespace::Testnet),
         );
-        let mut swarm = swarm::cli(identity.clone(), tor_socks5_port, behaviour).await?;
+        let mut swarm = swarm::cli(identity.clone(), None, behaviour).await?;
         swarm.add_peer_address(self.alice_peer_id, self.alice_address.clone());
 
         cli::EventLoop::new(swap_id, swarm, self.alice_peer_id, db.clone())