Move 65816 language definition to a widgets namespace

src/gui/widgets.h

@@ -0,0 +1,16 @@
+#ifndef YAZE_GUI_WIDGETS_H
+#define YAZE_GUI_WIDGETS_H
+
+#include <ImGuiColorTextEdit/TextEditor.h>
+
+namespace yaze {
+namespace gui {
+namespace widgets {
+
+TextEditor::LanguageDefinition GetAssemblyLanguageDef();
+
+}
+}  // namespace gui
+}  // namespace yaze
+
+#endif