move projects to src folder

src/DotNetSolutionTools.CLI/Commands/UpdateProjectToNet80Command.cs

@@ -0,0 +1,28 @@
+using DotNetSolutionTools.Core;
+using Spectre.Console.Cli;
+
+namespace DotNetSolutionTools.CLI.Commands;
+
+public class UpdateProjectToNet80Command : AsyncCommand<UpdateProjectToNet80Command.Settings>
+{
+    public sealed class Settings : CommandSettings
+    {
+        [CommandArgument(1, "<CsprojFilePath>")]
+        public required string CsprojFilePath { get; set; }
+    }
+
+    public override async Task<int> ExecuteAsync(CommandContext context, Settings settings)
+    {
+        if (!Directory.Exists(settings.CsprojFilePath))
+        {
+            Console.WriteLine("Invalid file path. Please pass in a valid file path to a .csproj file.");
+            return 1;
+        }
+        Console.WriteLine("Upgrading project to .NET 9.0");
+        await DotNetUpgrade.UpdateProjectAtPathToNet80(settings.CsprojFilePath);
+
+        Console.WriteLine("==================================================");
+        Console.WriteLine("Done!");
+        return 0;
+    }
+}