Better mute handling

This commit improves the robustness of mute list handling:
1. It listens to new mute lists from the relay interface, and saves them whenever there is a new one
2. It uses the user's own relay lists to fetch events (such as mute lists), helping to ensure we get their mute lists even when they are not stored in the Damus relay
3. It saves events it sees when fetching them from the network, if applicable

Changelog-Changed: Improved robustness of mute handling
Signed-off-by: Daniel D’Aquino <daniel@daquino.me>

Cargo.lock

@@ -1658,6 +1658,7 @@ dependencies = [
  "fallible-streaming-iterator",
  "hashlink",
  "libsqlite3-sys",
+ "serde_json",
  "smallvec",
 ]