refactor: modernize code, improve performance, and clean up various components.

Commands/ShowCommand.cs

@@ -1,4 +1,3 @@
-using System.Threading.Tasks;
 using Spectre.Console;
 using Toak.Configuration;
 
@@ -8,7 +7,7 @@ public static class ShowCommand
 {
     public static async Task ExecuteAsync(bool verbose)
     {
-        Toak.Core.Logger.Verbose = verbose;
+        Core.Logger.Verbose = verbose;
         var config = new ConfigManager().LoadConfig();
 
         var table = new Table();