Compiles again after command subsystem

terrified to start testing

orchid-std/src/std/option.rs

@@ -4,8 +4,8 @@ use std::pin::Pin;
 use futures::AsyncWrite;
 use orchid_api_traits::Encode;
 use orchid_base::{is, mk_errv, sym};
-use orchid_extension::conv::{ToExpr, TryFromExpr};
-use orchid_extension::expr::{Expr, ExprHandle};
+use orchid_extension::{ToExpr, TryFromExpr};
+use orchid_extension::{Expr, ExprHandle};
 use orchid_extension::gen_expr::{call, new_atom};
 use orchid_extension::tree::{GenMember, cnst, fun, prefix};
 use orchid_extension::{Atomic, DeserializeCtx, ForeignAtom, OwnedAtom, OwnedVariant, TAtom};