Add project files.

LeagueAPI/Models/ChampSelect/ChampSelectSwapState.cs

@@ -0,0 +1,16 @@
+using System.Text.Json.Serialization;
+
+namespace LeagueAPI.Models.ChampSelect;
+
+[JsonConverter(typeof(JsonStringEnumConverter))]
+public enum ChampSelectSwapState
+{
+    ACCEPTED,
+    CANCELLED,
+    DECLINED,
+    SENT,
+    RECEIVED,
+    INVALID,
+    BUSY,
+    AVAILABLE
+}