chore: where possible replace async-trait with native async trait s…

…upport in 1.75+ (reubeno#197)

Reduce usage of the async-trait crate where possible, using the async_fn_in_trait native feature in 1.75+.

brush-shell/src/shell_factory.rs

@@ -50,6 +50,30 @@ impl AsMut<brush_core::Shell> for StubShell {
     }
 }
 
+pub(crate) struct RustylineShellFactory;
+
+impl ShellFactory for RustylineShellFactory {
+    #[cfg(all(feature = "rustyline", any(windows, unix)))]
+    type ShellType = brush_interactive::RustylineShell;
+    #[cfg(any(not(feature = "rustyline"), not(any(windows, unix))))]
+    type ShellType = StubShell;
+
+    #[allow(unused)]
+    async fn create(
+        &self,
+        options: &brush_interactive::Options,
+    ) -> Result<Self::ShellType, brush_interactive::ShellError> {
+        #[cfg(all(feature = "rustyline", any(windows, unix)))]
+        {
+            brush_interactive::RustylineShell::new(options).await
+        }
+        #[cfg(any(not(feature = "rustyline"), not(any(windows, unix))))]
+        {
+            Err(brush_interactive::ShellError::InputBackendNotSupported)
+        }
+    }
+}
+
 pub(crate) struct ReedlineShellFactory;
 
 impl ShellFactory for ReedlineShellFactory {