refacto transformer with module hierarchy

src/transformer.rs

@@ -0,0 +1,13 @@
+//pub mod common;
+pub mod translate;
+pub mod replicate;
+
+use crate::point::Point;
+
+// re-export transformers to be abe to use it directly from transformer::
+pub use translate::Translate;
+pub use replicate::Replicate;
+
+pub trait Transformers {
+    fn apply(&self, point_list: &[Point]) -> Vec<Point>;
+}