add mysql database provider (#1375)

* refactor sqlite into separate library

* support mysql

* fixes

* sql fixes

* cleanup

* update changelog

ErsatzTV/Provider.cs

@@ -0,0 +1,7 @@
+namespace ErsatzTV;
+
+public record Provider(string Name, string Assembly) 
+{
+    public static Provider Sqlite = new (nameof(Sqlite), typeof(Infrastructure.Sqlite.Marker).Assembly.GetName().Name!);
+    public static Provider MySql = new (nameof(MySql), typeof(Infrastructure.MySql.Marker).Assembly.GetName().Name!);
+}