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/CreatorFactory.cs

@@ -0,0 +1,44 @@
+using System.IO;
+using Microsoft.Extensions.Logging.Abstractions;
+using SixLabors.ImageSharp.PixelFormats;
+
+namespace MaddoShared.ImageSharpTests.Helpers
+{
+    public static class CreatorFactory
+    {
+        public static MaddoShared.PicSettings CreateDefaultPicSettings()
+        {
+            return new MaddoShared.PicSettings
+            {
+                DimStandard = 48,
+                DimStandardMiniatura = 12,
+                LarghezzaSmall = 150,
+                AltezzaSmall = 150,
+                LarghezzaBig = 800,
+                AltezzaBig = 600,
+                Trasparenza = 0,
+                IlFont = "Arial",
+                Grassetto = false,
+                Posizione = "CENTRO",
+                Allineamento = "CENTRO",
+                Margine = 10,
+                MargVert = 10,
+                TestoMin = false,
+                AggNumTempMin = false,
+                CreaMiniature = false,
+                LogoAggiungi = false,
+                LogoAltezza = 100,
+                LogoLarghezza = 100,
+                LogoMargine = "0",
+                JpegQuality = 90,
+                JpegQualityMin = 75,
+            };
+        }
+
+        public static MaddoShared.ImageCreatorImageSharp CreateImageCreator(MaddoShared.PicSettings settings)
+        {
+            var logger = NullLogger<MaddoShared.ImageCreatorImageSharp>.Instance;
+            return new MaddoShared.ImageCreatorImageSharp(settings, logger);
+        }
+    }
+}