feat: add AccountsChanged and AccountsItemChanged events (#6118)

- **feat: add `AccountsChanged` and `AccountsItemChanged` events**
- **emit event and add tests**

closes #6106

TODO:
- [x] test receiving synced config from second device
- [x] bug: investigate how to delay the configuration event until it is
actually configured - because desktop gets the event but still shows
account as if it was unconfigured, maybe event is emitted before the
value is written to the database?
- [x] update node bindings constants

src/test_utils.rs

@@ -391,7 +391,7 @@ impl TestContext {
         Self {
             ctx,
             dir,
-            evtracker: EventTracker(evtracker_receiver),
+            evtracker: EventTracker::new(evtracker_receiver),
             _log_sink,
         }
     }
@@ -1087,6 +1087,10 @@ impl DerefMut for EventTracker {
 }
 
 impl EventTracker {
+    pub fn new(emitter: EventEmitter) -> Self {
+        Self(emitter)
+    }
+
     /// Consumes emitted events returning the first matching one.
     ///
     /// If no matching events are ready this will wait for new events to arrive and time out