Add project files.

LeagueAPI/Models/ChampSelect/ChampSelectSwapContract.cs

@@ -0,0 +1,15 @@
+using System.Text.Json.Serialization;
+
+namespace LeagueAPI.Models.ChampSelect;
+
+public record class ChampSelectSwapContract
+{
+    [JsonPropertyName("id")]
+    public long Id { get; init; }
+
+    [JsonPropertyName("cellId")]
+    public long CellId { get; init; }
+
+    [JsonPropertyName("state")]
+    public ChampSelectSwapState State { get; init; }
+}