add /api/player/play endpoint

fix not being able to play track with a playlist reference ``&list=`` attached

TomatenMusic/Models/EventArgs/TrackPlayArgs.cs

@@ -0,0 +1,22 @@
+using Emzi0767.Utilities;
+using Lavalink4NET.Player;
+using TomatenMusic.Music;
+
+namespace TomatenMusic_Api.Models.EventArgs
+{
+    public class TrackPlayArgs : AsyncEventArgs
+    {
+        public MusicActionResponse Response { get; set; }
+        public ulong GuildId { get; set; }
+        public TimeSpan StartTime { get; set; }
+        public bool Now { get; set; }
+
+        public TrackPlayArgs(MusicActionResponse response, ulong guildId, TimeSpan startTime, bool now)
+        {
+            Response = response;
+            GuildId = guildId;
+            StartTime = startTime;
+            Now = now;
+        }
+    }
+}