Split into legacy (Framework 4.8) and .NET 8 projects, WIP .NET 8 fixes

Flowframes/Data/Streams/DataStream.cs

@@ -0,0 +1,17 @@
+namespace Flowframes.Data.Streams
+{
+    public class DataStream : Stream
+    {
+        public DataStream(string codec, string codecLong)
+        {
+            base.Type = StreamType.Data;
+            Codec = codec;
+            CodecLong = codecLong;
+        }
+
+        public override string ToString()
+        {
+            return $"{base.ToString()}";
+        }
+    }
+}