Revert "This introduces the bug", back to working

This reverts commit 1461968.

crates/main_lib/tests/uat.rs

@@ -1,6 +1,6 @@
 use cucumber::World;
 use sub_lib::Cat;
-use sub_lib_gherkin::sub_lib::context::AnimalWorld;
+use sub_lib_gherkin::sub_lib::AnimalWorld;
 
 // This runs before everything else, so you can setup things here.
 #[tokio::main]

crates/sub_lib_gherkin/src/sub_lib/mod.rs

@@ -1,8 +1,12 @@
 use cucumber::*;
+use sub_lib::Cat;
 
-pub mod context;
-
-use context::AnimalWorld;
+// `World` is your shared, likely mutable state.
+// Cucumber constructs it via `Default::default()` for each scenario.
+#[derive(Debug, Default, World)]
+pub struct AnimalWorld {
+    pub(crate) cat: Cat,
+}
 
 // Steps are defined with `given`, `when` and `then` attributes.
 #[given("a hungry cat")]