Add built-in plugin MediaInfoViewer

1. Merged from forked repo https://github.com/emako/QuickLook/tree/master/QuickLook.Plugin/QuickLook.Plugin.MediaInfoViewer
2. Use TextBox instead of AvalonEdit and prepare for new feature

QuickLook.Plugin/QuickLook.Plugin.MediaInfoViewer/Plugin.cs

@@ -0,0 +1,109 @@
+// Copyright © 2017-2025 QL-Win Contributors
+//
+// This file is part of QuickLook program.
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+using MediaInfoLib;
+using QuickLook.Common.Helpers;
+using QuickLook.Common.Plugin;
+using System;
+using System.IO;
+using System.Linq;
+using System.Windows;
+using System.Windows.Media;
+
+namespace QuickLook.Plugin.MediaInfoViewer;
+
+public class Plugin : IViewer
+{
+    private TextViewerPanel _tvp;
+
+    public int Priority => 0;
+
+    public void Init()
+    {
+    }
+
+    public bool CanHandle(string path)
+    {
+        // We only handle files with specific caller
+        return false;
+    }
+
+    public void Prepare(string path, ContextObject context)
+    {
+        context.PreferredSize = new Size { Width = 800, Height = 600 };
+    }
+
+    public void View(string path, ContextObject context)
+    {
+        using MediaInfo lib = new MediaInfo()
+            .WithOpen(path);
+
+        _tvp = new TextViewerPanel(lib.Inform(), context);
+        AssignHighlightingManager(_tvp, context);
+
+        _tvp.Tag = context;
+        _tvp.Drop += OnDrop;
+
+        context.ViewerContent = _tvp;
+        context.Title = $"{Path.GetFileName(path)}";
+        context.IsBusy = false;
+    }
+
+    private void OnDrop(object sender, DragEventArgs e)
+    {
+        if (e.Data.GetDataPresent(DataFormats.FileDrop))
+        {
+            if (e.Data.GetData(DataFormats.FileDrop) is string[] files
+                && files.FirstOrDefault() is string path)
+            {
+                if (_tvp!.Tag is ContextObject context)
+                {
+                    context.Title = $"{Path.GetFileName(path)}";
+                }
+
+                using MediaInfo lib = new MediaInfo()
+                    .WithOpen(path);
+                _tvp!.Text = lib.Inform();
+            }
+        }
+    }
+
+    public void Cleanup()
+    {
+        GC.SuppressFinalize(this);
+
+        _tvp = null!;
+    }
+
+    private void AssignHighlightingManager(TextViewerPanel tvp, ContextObject context)
+    {
+        var isDark = OSThemeHelper.AppsUseDarkTheme();
+
+        if (isDark)
+        {
+            context.Theme = Themes.Dark;
+            tvp.Foreground = new BrushConverter().ConvertFromString("#FFEFEFEF") as SolidColorBrush;
+            tvp.Background = Brushes.Transparent;
+        }
+        else
+        {
+            context.Theme = Themes.Light;
+            tvp.Foreground = new BrushConverter().ConvertFromString("#BBFAFAFA") as SolidColorBrush;
+            tvp.Background = Brushes.Transparent;
+        }
+    }
+}