fix(tvix/cli): use tvix_eval::StdIO in CLI

... until we have a store-I/O layer, or something that intercepts the
store-related stuff appropriately.

Change-Id: I22f63435b3f9e118e3faeb2924fda8373a23ea7f
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7568
Reviewed-by: grfn <grfn@gws.fyi>
Tested-by: BuildkiteCI

tvix/cli/src/main.rs

@@ -39,6 +39,7 @@ struct Args {
 /// evaluation succeeded.
 fn interpret(code: &str, path: Option<PathBuf>, args: &Args) -> bool {
     let mut eval = tvix_eval::Evaluation::new(code, path);
+    eval.io_handle = Box::new(tvix_eval::StdIO);
     eval.nix_path = args.nix_search_path.clone();
 
     let source_map = eval.source_map();