Add notes for version 0.4.0

Author: jpsacha

notes/0.4.0.md

@@ -0,0 +1,16 @@
+### ScalaFX-Extras Release v.0.4.0
+
+Enhancement:
+
+* Support use in Scala 3 by removing use of ScalaFX (Scala 2 macros) [Issue #12][12]. That required some changes in
+  MVCfx API (Scala 2 use stays the same). See demos for examples of the new use.
+* Update to ScalaFX 16.0.0-R25
+
+To post questions please use [Project Discussions][Discussions] or [ScalaFX Users Group][scalafx-users]
+
+[scalafx-users]: https://groups.google.com/forum/#!forum/scalafx-users
+
+[Discussions]: https://github.com/scalafx/scalafx-extras/discussions
+
+[12]: https://github.com/scalafx/scalafx-extras/issues/12
+