add None and opposites and fix naming

Independent was actually NotIndependent

src/ImageSharp/MetaData/Profiles/ICC/Enums/IccProfileFlag.cs

@@ -15,14 +15,29 @@ namespace ImageSharp
     [Flags]
     internal enum IccProfileFlag : int
     {
+        /// <summary>
+        /// No flags (equivalent to NotEmbedded and Independent)
+        /// </summary>
+        None = 0,
+
         /// <summary>
         /// Profile is embedded within another file
         /// </summary>
         Embedded = 1 << 0,
 
+        /// <summary>
+        /// Profile is embedded within another file
+        /// </summary>
+        NotEmbedded = 0,
+
         /// <summary>
         /// Profile cannot be used independently of the embedded colour data
         /// </summary>
-        Independent = 1 << 1,
+        NotIndependent = 1 << 1,
+
+        /// <summary>
+        /// Profile can be used independently of the embedded colour data
+        /// </summary>
+        Independent = 0,
     }
 }