Move workspace crates into subfolder

crates/items_0/src/container.rs

@@ -0,0 +1,11 @@
+use crate::Events;
+
+pub trait ByteEstimate {
+    fn byte_estimate(&self) -> u64;
+}
+
+impl ByteEstimate for Box<dyn Events> {
+    fn byte_estimate(&self) -> u64 {
+        self.as_ref().byte_estimate()
+    }
+}