Write missing docs and Debug implementations for web

web/src/command/action.rs

@@ -2,6 +2,8 @@ pub enum Action<T> {
     Future(iced_futures::BoxFuture<T>),
 }
 
+use std::fmt;
+
 impl<T> Action<T> {
     /// Applies a transformation to the result of a [`Command`].
     #[cfg(target_arch = "wasm32")]
@@ -16,3 +18,11 @@ impl<T> Action<T> {
         }
     }
 }
+
+impl<T> fmt::Debug for Action<T> {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match self {
+            Self::Future(_) => write!(f, "Action::Future"),
+        }
+    }
+}