Merge branch '46-bug-voidgenerator-does-not-work' into 'main'

Resolve "Bug: VoidGenerator does not work"

Closes #46

See merge request open-source/dotnet/i18n-commander!21

I18N Commander/Processor/Generators/VoidGenerator.cs

@@ -2,5 +2,5 @@
 
 public class VoidGenerator : IGenerator
 {
-    public Task GenerateAsync() => Task.CompletedTask;
+    public Task<ProcessorResult<long>> GenerateAsync() => Task.FromResult(new ProcessorResult<long>(0));
 }

I18N Commander/UI WinForms/Components/SectionTree.cs

@@ -10,7 +10,7 @@ namespace UI_WinForms.Components;
 public partial class SectionTree : UserControl
 {
     private static readonly Dictionary<TreeNode, EventHandler<DataModel.Database.Translation?>?> NODE_PROGRESS_HANDLERS = new();
-    private readonly Timer generatorTimer;
+    private readonly Timer generatorTimer = null!;
 
     public SectionTree()
     {