Add option to open file path manually

Author: NotNite

Alpha/Gui/Windows/FilesystemWindow.cs

@@ -16,6 +16,7 @@ public class FilesystemWindow : Window, IDisposable {
     public FileResource? File;
 
     private string filter = string.Empty;
+    private string manualFile = string.Empty;
     private readonly HashSet<string> filteredDirectories = [];
     private readonly HashSet<string> visibleRootCategories = [..PathService.RootCategories.Keys];
     private readonly List<PathService.File> selectedFiles = new();
@@ -82,6 +83,10 @@ private void DrawSidebar() {
                 this.GameDataChanged();
             }
 
+            ImGui.InputText("##FilesystemWindow_ManualFile", ref this.manualFile, 1024);
+            ImGui.SameLine();
+            if (ImGui.Button("Open")) this.Open(new PathService.File(this.manualFile));
+
             var hasSelectedFiles = this.selectedFiles.Count > 0;
             if (!hasSelectedFiles) ImGui.BeginDisabled();
             if (ImGui.Button("Export selected files")) {