feat(api): add get_current_window call

Add prof_get_current_window API to retrieve the title of the currently active window, matching the titlebar display.

The feature is especially useful to track currently used plugin window.

apidocs/python/src/prof.py

@@ -830,6 +830,22 @@ def get_current_recipient() -> str | None:
     """
     pass
 
+def get_current_window() -> str:
+    """Retrieves the title of the current window as shown in the titlebar.
+
+    Returns the title of the currently active window, matching the titlebar display.
+    Special cases:
+    - For MUC configuration windows, includes "config" and an asterisk if modified (e.g., "room@example.com config \*").
+    - For vCard windows, includes the bare JID and an asterisk if modified (e.g., "vCard user@example.com \*").
+
+    :return: The window title as a string.
+
+    Example::
+
+        title = prof.get_current_window()
+        prof.cons_show(f"Current window: {title}")
+    """
+
 def get_current_muc() -> str | None:
     """Retrieves the Jabber ID of the current chat room.