Add day 1

Days/Day2.cs

@@ -7,7 +7,12 @@ public class Day2 : Day
     public override int Number { get; } = 2;
     public override string Name { get; } = "Second day";
     
-    public override void Run()
+    public override void RunPart1()
+    {
+        AnsiConsole.WriteLine("Day 2 result");
+    }
+    
+    public override void RunPart2()
     {
         AnsiConsole.WriteLine("Day 2 result");
     }