Feature: Added support for opening and extracting mrpack files (#14942)

Author: yaira2

src/Files.App (Package)/Package.appxmanifest

@@ -142,6 +142,7 @@
                             <uap:FileType>.rar</uap:FileType>
                             <uap:FileType>.tar</uap:FileType>
                             <uap:FileType>.jar</uap:FileType>
+                            <uap:FileType>.mrpack</uap:FileType>
                         </uap:SupportedFileTypes>
                         <uap:Logo>assets\archives\ExtensionIcon.png</uap:Logo>
                     </uap:FileTypeAssociation>

src/Files.Shared/Helpers/FileExtensionHelpers.cs

@@ -72,7 +72,7 @@ public static bool IsPowerShellFile(string fileExtensionToCheck)
 		/// <returns><c>true</c> if the fileExtensionToCheck is a zip bundle file; otherwise, <c>false</c>.</returns>
 		public static bool IsZipFile(string? fileExtensionToCheck)
 		{
-			return HasExtension(fileExtensionToCheck, ".zip", ".msix", ".appx", ".msixbundle", ".appxbundle", ".7z", ".rar", ".tar", ".mcpack", ".mcworld", ".jar", ".gz", ".lzh");
+			return HasExtension(fileExtensionToCheck, ".zip", ".msix", ".appx", ".msixbundle", ".appxbundle", ".7z", ".rar", ".tar", ".mcpack", ".mcworld", ".mrpack", ".jar", ".gz", ".lzh");
 		}
 
 		public static bool IsBrowsableZipFile(string? filePath, out string? ext)
@@ -85,7 +85,7 @@ public static bool IsBrowsableZipFile(string? filePath, out string? ext)
 			}
 
 			// Only extensions we want to browse
-			ext = new[] { ".zip", ".7z", ".rar", ".tar", ".gz", ".lzh", ".jar" }
+			ext = new[] { ".zip", ".7z", ".rar", ".tar", ".gz", ".lzh", ".mrpack", ".jar" }
 				.FirstOrDefault(x => filePath.Contains(x, StringComparison.OrdinalIgnoreCase));
 
 			return ext is not null;