Merge nucleic/sleek-thistle-egret-fyej into dev

brush-interactive/src/refs.rs

@@ -0,0 +1,9 @@
+use std::sync::Arc;
+
+use tokio::sync::Mutex;
+
+/// A reference-counted, thread-safe reference to a `brush_core::Shell`.
+#[allow(type_alias_bounds)]
+pub type ShellRef<
+    SE: brush_core::ShellExtensions = brush_core::extensions::DefaultShellExtensions,
+> = Arc<Mutex<brush_core::Shell<SE>>>;