V12: Update ImageSharp V3 and Add Legacy V2 Project (#14216)

* Rename old imagesharp to v2

* Add Ronalds PR as imagesharp

* Ensure that we use V3 by default

src/Umbraco.Cms.Imaging.ImageSharp.V2/ConfigurePhysicalFileSystemCacheOptions.cs

@@ -0,0 +1,37 @@
+using Microsoft.Extensions.Hosting;
+using Microsoft.Extensions.Options;
+using SixLabors.ImageSharp.Web.Caching;
+using Umbraco.Cms.Core.Configuration.Models;
+using Umbraco.Cms.Core.Extensions;
+
+namespace Umbraco.Cms.Imaging.ImageSharp.V2;
+
+/// <summary>
+///     Configures the ImageSharp physical file system cache options.
+/// </summary>
+/// <seealso cref="IConfigureOptions{PhysicalFileSystemCacheOptions}" />
+public sealed class ConfigurePhysicalFileSystemCacheOptions : IConfigureOptions<PhysicalFileSystemCacheOptions>
+{
+    private readonly IHostEnvironment _hostEnvironment;
+    private readonly ImagingSettings _imagingSettings;
+
+    /// <summary>
+    ///     Initializes a new instance of the <see cref="ConfigurePhysicalFileSystemCacheOptions" /> class.
+    /// </summary>
+    /// <param name="imagingSettings">The Umbraco imaging settings.</param>
+    /// <param name="hostEnvironment">The host environment.</param>
+    public ConfigurePhysicalFileSystemCacheOptions(
+        IOptions<ImagingSettings> imagingSettings,
+        IHostEnvironment hostEnvironment)
+    {
+        _imagingSettings = imagingSettings.Value;
+        _hostEnvironment = hostEnvironment;
+    }
+
+    /// <inheritdoc />
+    public void Configure(PhysicalFileSystemCacheOptions options)
+    {
+        options.CacheFolder = _hostEnvironment.MapPathContentRoot(_imagingSettings.Cache.CacheFolder);
+        options.CacheFolderDepth = _imagingSettings.Cache.CacheFolderDepth;
+    }
+}