re-add core crates packages on no_std which is not imported

src/error.rs

@@ -5,6 +5,9 @@ use crate::token::Position;
 
 use crate::stdlib::{boxed::Box, char, error::Error, fmt, string::String};
 
+#[cfg(feature = "no_std")]
+use crate::alloc::string::ToString;
+
 /// Error when tokenizing the script text.
 #[derive(Debug, Eq, PartialEq, Clone, Hash)]
 pub enum LexError {

src/packages/array_basic.rs

@@ -10,6 +10,9 @@ use crate::token::Position;
 
 use crate::stdlib::{any::TypeId, boxed::Box};
 
+#[cfg(feature = "no_std")]
+use crate::alloc::string::ToString;
+
 // Register array utility functions
 fn push<T: Variant + Clone>(list: &mut Array, item: T) -> FuncReturn<()> {
     list.push(Dynamic::from(item));

src/packages/string_more.rs

@@ -10,6 +10,9 @@ use crate::utils::StaticVec;
 #[cfg(not(feature = "no_index"))]
 use crate::engine::Array;
 
+#[cfg(feature = "no_std")]
+use crate::alloc::boxed::Box;
+
 use crate::stdlib::{
     any::TypeId,
     fmt::Display,