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

deltachat-rpc-client/tests/test_account_events.py

@@ -0,0 +1,29 @@
+from __future__ import annotations
+
+from typing import TYPE_CHECKING
+
+from deltachat_rpc_client import EventType
+
+if TYPE_CHECKING:
+    from deltachat_rpc_client.pytestplugin import ACFactory
+
+
+def test_event_on_configuration(acfactory: ACFactory) -> None:
+    """
+    Test if ACCOUNTS_ITEM_CHANGED event is emitted on configure
+    """
+
+    account = acfactory.new_preconfigured_account()
+    account.clear_all_events()
+    assert not account.is_configured()
+    future = account.configure.future()
+    while True:
+        event = account.wait_for_event()
+        if event.kind == EventType.ACCOUNTS_ITEM_CHANGED:
+            break
+    assert account.is_configured()
+
+    future()
+
+
+# other tests are written in rust: src/tests/account_events.rs