Added method to set the font config directory.

Author: dlemstra

src/Magick.NET/MagickNET.cs

@@ -237,6 +237,13 @@ public static void Initialize(ConfigurationFiles configFiles, string path)
         public static void ResetRandomSeed()
             => NativeMagickNET.SetRandomSeed(-1);
 
+        /// <summary>
+        /// Sets the directory that contains the FontConfig configuration files.
+        /// </summary>
+        /// <param name="path">The path of the FontConfig directory.</param>
+        public static void SetFontConfigDirectory(string path)
+            => Environment.SetEnv("FONTCONFIG_PATH", FileHelper.GetFullPath(path));
+
         /// <summary>
         /// Sets the directory that contains the Ghostscript file gsdll32.dll / gsdll64.dll.
         /// </summary>