feat: add test sandbox helper and enable tokio multi-thread runtime

Replace `copy_with_temp_rename` module with `test_sandbox` providing
automatic cleanup of test directories. Add `rt`, `rt-multi-thread`, and
`macros` tokio features.

1 files changed, 4 insertions, 1 deletions

diff --git a/Cargo.toml b/Cargo.toml
index 11ce5f3..50d91d8 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -28,5 +28,8 @@ rola-draft = { path = "rola-draft" }
 [workspace.dependencies.tokio]
 version = "1.52.3"
 features = [
-    "fs"
+    "fs",
+    "rt",
+    "rt-multi-thread",
+    "macros"
 ]