refactor project structure (start of redoing atomic branch without atomics)

src/default/event.rs

@@ -0,0 +1,9 @@
+use crate::layout::DefaultEvent;
+
+#[derive(Eq, PartialEq, Hash, Clone)]
+pub struct Submit;
+impl DefaultEvent for Submit {}
+
+#[derive(Eq, PartialEq, Hash, Clone)]
+pub struct Edited;
+impl DefaultEvent for Edited {}