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/FaceMatcherResultItem.cs

@@ -0,0 +1,24 @@
+namespace ImageCatalog_2.Models;
+
+public sealed class FaceMatcherResultItem
+{
+    public string PhotoId { get; init; } = string.Empty;
+
+    public double? Score { get; init; }
+
+    public string ScoreDisplay => Score.HasValue ? Score.Value.ToString("0.###") : string.Empty;
+
+    public string ResolvedImagePath { get; init; } = string.Empty;
+
+    public int CandidateCount { get; init; }
+
+    public string RawRow { get; init; } = string.Empty;
+
+    public string DebugSummary { get; init; } = string.Empty;
+
+    public string SearchImagePath { get; init; } = string.Empty;
+
+    public string CsvPath { get; init; } = string.Empty;
+
+    public string LogPath { get; init; } = string.Empty;
+}