display war,campaign,round menu

src/warchron/model/campaign.py

@@ -59,3 +59,9 @@ class Campaign:
         rnd = next((r for r in self.rounds if r.id == round_id), None)
         if rnd:
             self.rounds.remove(rnd)
+
+    def get_round_index(self, round_id: str) -> int:
+        for index, rnd in enumerate(self.rounds, start=1):
+            if rnd.id == round_id:
+                return index
+        raise KeyError("Round not found in campaign")