Implement ImageCreatorImageSharp using SixLabors.ImageSharp for image processing

- Added ImageCreatorImageSharp class for image creation, handling EXIF orientation, resizing, and saving images.
- Replaced GDI+ dependencies with ImageSharp for cross-platform compatibility.
- Introduced methods for drawing text and logos on images, including handling transparency and positioning.
- Created a test plan for validating ImageCreatorImageSharp functionality, focusing on image resizing, text positioning, logo features, and EXIF orientation.
- Added documentation for the test plan outlining goals, project structure, and implementation notes.

MaddoShared.ImageSharpTests/Helpers/TestImageFactory.cs

@@ -0,0 +1,45 @@
+using System.IO;
+using SixLabors.ImageSharp;
+using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.ImageSharp.Processing;
+using SixLabors.ImageSharp.Formats.Jpeg;
+using SixLabors.ImageSharp.Metadata.Profiles.Exif;
+
+namespace MaddoShared.ImageSharpTests.Helpers
+{
+    public static class TestImageFactory
+    {
+        public static string CreateSolidJpeg(string directory, string fileName, int width, int height, Rgba32 color)
+        {
+            Directory.CreateDirectory(directory);
+            var path = Path.Combine(directory, fileName);
+            using var img = new Image<Rgba32>(width, height, color);
+            var encoder = new JpegEncoder { Quality = 90 };
+            img.Save(path, encoder);
+            return path;
+        }
+
+        public static string CreateSolidPng(string directory, string fileName, int width, int height, Rgba32 color)
+        {
+            Directory.CreateDirectory(directory);
+            var path = Path.Combine(directory, fileName);
+            using var img = new Image<Rgba32>(width, height, color);
+            img.SaveAsPng(path);
+            return path;
+        }
+
+        public static string CreateJpegWithExifOrientation(string directory, string fileName, int width, int height, Rgba32 color, ushort orientation)
+        {
+            Directory.CreateDirectory(directory);
+            var path = Path.Combine(directory, fileName);
+            using var img = new Image<Rgba32>(width, height, color);
+            // Add EXIF orientation
+            var profile = new ExifProfile();
+            profile.SetValue(ExifTag.Orientation, orientation);
+            img.Metadata.ExifProfile = profile;
+            var encoder = new JpegEncoder { Quality = 90 };
+            img.Save(path, encoder);
+            return path;
+        }
+    }
+}