Add project files.

LeagueAPI/Models/ChampSelect/BenchChampion.cs

@@ -0,0 +1,12 @@
+using System.Text.Json.Serialization;
+
+namespace LeagueAPI.Models.ChampSelect;
+
+public record class BenchChampion
+{
+    [JsonPropertyName("championId")]
+    public int ChampionId { get; init; }
+
+    [JsonPropertyName("isPriority")]
+    public bool IsPriority { get; init; }
+}