feat: Add Face Matcher functionality and related settings

- Implemented FilePathToBitmapConverter for image loading.
- Enhanced DataModel with commands and properties for Face Matcher.
- Created FaceMatcherResultItem model to store results.
- Updated SettingsDto to include Face Matcher paths and tolerance.
- Introduced PickerPreferenceService for managing folder paths.
- Expanded AiSettingsViewModel to manage Face Matcher settings and results.

imagecatalog/Models/SettingsDto.cs

@@ -314,6 +314,14 @@ namespace ImageCatalog_2.Models
         [XmlElement("AI_FaceUpsample")]
         public bool FaceUpsample { get; set; } = true;
 
+        [JsonPropertyName("FaceMatcherExecutablePath")]
+        [XmlElement("AI_FaceMatcherExecutablePath")]
+        public string FaceMatcherExecutablePath { get; set; } = string.Empty;
+
+        [JsonPropertyName("FaceMatcherTolerance")]
+        [XmlElement("AI_FaceMatcherTolerance")]
+        public double FaceMatcherTolerance { get; set; } = 0.5;
+
         // Race upload settings
         [JsonPropertyName("ApiLogin")]
         [XmlElement("RaceUpload_Login")]