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

Entities/Radio.cs

@@ -0,0 +1,12 @@
+namespace Shadow.Entities;
+public class Radio
+{
+	required public int Id { get; set; }
+	required public string Name { get; set; }
+	required public string NormalizedName { get; set; }
+	public string? Homepage { get; set; } = null;
+	required public string Url { get; set; }
+	required public int UserId { get; set; }
+
+	required public User User { get; set; }
+}