Initial commit: NFC Actions Windows tray application

Implement PC/SC-based NFC card reader monitoring application with WPF UI. Features include:
- System tray integration with single-click to open main window
- Dynamic reader detection and management with enable/disable per reader
- NDEF payload extraction supporting Type 2 and Type 4 tags
- Auto-detection of block sizes (4-byte vs 16-byte) for different reader types
- Configurable actions: copy to clipboard, launch URLs, keyboard input simulation
- URI record type detection - only launches browser for actual URI records
- Real-time activity logging with color-coded levels (Debug, Info, Warning, Error)
- File-based debug logging for troubleshooting
- Settings persistence between sessions
- Dangerous Things branding with custom icons and clickable logo

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

NfcActions/Models/AppSettings.cs

@@ -0,0 +1,11 @@
+using System.Collections.Generic;
+
+namespace NfcActions.Models;
+
+public class AppSettings
+{
+    public HashSet<string> DisabledReaders { get; set; } = new();
+    public bool CopyToClipboard { get; set; } = false;
+    public bool LaunchUrls { get; set; } = true;
+    public bool TypeAsKeyboard { get; set; } = false;
+}

NfcActions/Models/ReaderItem.cs

@@ -0,0 +1,30 @@
+using System.ComponentModel;
+
+namespace NfcActions.Models;
+
+public class ReaderItem : INotifyPropertyChanged
+{
+    private bool _isEnabled;
+
+    public string Name { get; set; } = string.Empty;
+
+    public bool IsEnabled
+    {
+        get => _isEnabled;
+        set
+        {
+            if (_isEnabled != value)
+            {
+                _isEnabled = value;
+                OnPropertyChanged(nameof(IsEnabled));
+            }
+        }
+    }
+
+    public event PropertyChangedEventHandler? PropertyChanged;
+
+    protected virtual void OnPropertyChanged(string propertyName)
+    {
+        PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
+    }
+}