v1.16 — Remove PowerShell edition, restore flat project structure

PowerShell version removed — will use OV code signing certificate instead.
Files moved back from src/ to project root.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Pages/EditionPage.xaml.cs

@@ -0,0 +1,80 @@
+using System.Windows;
+using System.Windows.Controls;
+using InstaSoftOfficeTool.Models;
+
+namespace InstaSoftOfficeTool.Pages
+{
+    public partial class EditionPage : Page, IWizardPage
+    {
+        private readonly MainWindow _main;
+        private readonly InstallConfig _config;
+        private readonly OfficeEdition[] _editions;
+
+        public EditionPage(MainWindow main, InstallConfig config)
+        {
+            InitializeComponent();
+            _main = main;
+            _config = config;
+            _editions = OfficeEdition.GetEditions(_config.Version);
+
+            SubtitleText.Text = _config.GetVersionDisplayName() + " — melyik kiadast szeretne?";
+
+            BuildEditionCards();
+        }
+
+        private void BuildEditionCards()
+        {
+            EditionPanel.Children.Clear();
+
+            for (int i = 0; i < _editions.Length; i++)
+            {
+                var edition = _editions[i];
+                var rb = new RadioButton
+                {
+                    GroupName = "Edition",
+                    IsChecked = i == 0 || (_config.Edition != null && _config.Edition.ProductId == edition.ProductId),
+                    Style = (Style)FindResource("CardRadioButton"),
+                    Margin = new Thickness(0, 0, 0, 10),
+                    Tag = i
+                };
+
+                var sp = new StackPanel { Margin = new Thickness(8, 2, 8, 2) };
+
+                var titleBlock = new TextBlock
+                {
+                    Text = edition.DisplayName,
+                    FontSize = 18,
+                    FontWeight = FontWeights.SemiBold
+                };
+                sp.Children.Add(titleBlock);
+
+                var descBlock = new TextBlock
+                {
+                    Text = edition.Description,
+                    FontSize = 12,
+                    Foreground = (System.Windows.Media.Brush)FindResource("TextSecondaryBrush"),
+                    TextWrapping = TextWrapping.Wrap,
+                    Margin = new Thickness(0, 2, 0, 0)
+                };
+                sp.Children.Add(descBlock);
+
+                rb.Content = sp;
+                EditionPanel.Children.Add(rb);
+            }
+        }
+
+        public bool Validate()
+        {
+            foreach (var child in EditionPanel.Children)
+            {
+                if (child is RadioButton rb && rb.IsChecked == true)
+                {
+                    int idx = (int)rb.Tag;
+                    _config.Edition = _editions[idx];
+                    return true;
+                }
+            }
+            return false;
+        }
+    }
+}