fix(rust): export anonymousscan in lazy prelude (#5295)

Author: universalmind303

polars/polars-lazy/polars-plan/src/logical_plan/anonymous_scan.rs

@@ -2,7 +2,7 @@ use std::fmt::{Debug, Formatter};
 
 use polars_core::prelude::*;
 
-use crate::prelude::AnonymousScanOptions;
+pub use super::options::AnonymousScanOptions;
 
 pub trait AnonymousScan: Send + Sync {
     /// Creates a dataframe from the supplied function & scan options.

polars/polars-lazy/src/prelude.rs

@@ -1,5 +1,7 @@
 pub(crate) use polars_ops::prelude::*;
-pub use polars_plan::logical_plan::{Literal, LiteralValue, LogicalPlan, Null, NULL};
+pub use polars_plan::logical_plan::{
+    AnonymousScan, AnonymousScanOptions, Literal, LiteralValue, LogicalPlan, Null, NULL,
+};
 pub(crate) use polars_plan::prelude::*;
 #[cfg(feature = "rolling_window")]
 pub use polars_time::{prelude::RollingOptions, Duration};