Move to a folder

Author: morenol

src/model_selection/hyper_tuning.rs renamed to src/model_selection/hyper_tuning/grid_search.rs

@@ -5,7 +5,7 @@ use crate::{
     math::num::RealNumber,
 };
 
-use super::{cross_validate, BaseKFold, CrossValidationResult};
+use crate::model_selection::{cross_validate, BaseKFold, CrossValidationResult};
 
 /// grid search results.
 #[derive(Clone, Debug)]

src/model_selection/hyper_tuning/mod.rs

@@ -0,0 +1,2 @@
+mod grid_search;
+pub use grid_search::{grid_search, GridSearchResult};