feat: add database connections, initial migration and early CLI tooling

Entities/Image.cs

@@ -0,0 +1,14 @@
+namespace Shadow.Entities;
+public class Image
+{
+	required public int Id { get; set; }
+	required public string Uri { get; set; }
+	public int State { get; set; }
+	public int? SongId { get; set; } = null;
+
+	public Song? Song { get; set; } = null;
+
+	public bool IsAvailable() => State == 0;
+	public bool IsOrphaned() => State == 1;
+
+}