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

Entities/Artist.cs

@@ -0,0 +1,12 @@
+namespace Shadow.Entities;
+public class Artist
+{
+	required public int Id { get; set; }
+	required public string Name { get; set; }
+	required public string NormalizedName { get; set; }
+
+	// List of artists songs
+	public List<Song> Songs { get; set; } = [];
+	// List of artists albums
+	public List<Album> Albums { get; set; } = [];
+}