WIP: track creation and deletion both in frontend and backend.

Source/Project.cs

@@ -0,0 +1,46 @@
+using System.Collections.Generic;
+
+namespace AudioEditor;
+
+public class Project
+{
+    public int TrackCount => _tracks.Count;
+    public void AddTrack()
+    {
+        var idx = _tracks.Count;
+        _tracks.Add(new Track(idx, string.Empty));
+    }
+
+    public void DuplicateTrack(int idx)
+    {
+        if (idx < 0 && idx > _tracks.Count - 1)
+        {
+            return;
+        }
+
+        var track = _tracks[idx];
+        var duplicate = track.Duplicate();
+
+        _tracks.Add(duplicate);
+    }
+
+    public void RenameTrack(int idx, string name)
+    {
+        if (idx < 0 && idx > _tracks.Count - 1)
+        {
+            return;
+        }
+    }
+
+    public void DeleteTrack(int idx)
+    {
+        if (idx < 0 && idx > _tracks.Count - 1)
+        {
+            return;
+        }
+
+        _tracks.RemoveAt(idx);
+    }
+
+    private List<Track> _tracks = new();
+}