patern_preview: Adding patern preview

This adds a preview of the patern placement, checking out of bound

includes/patern_preview.hpp

@@ -0,0 +1,32 @@
+/*
+* File name: patern_preview.hpp
+* Author: lejulien
+* Date created: 01-01-1970 00:59:59
+// Date modified: 12-01-2026 21:30:10
+* ------
+*/
+
+#pragma once
+
+#include <memory>
+
+#include <raylib.h>
+
+#include <context.hpp>
+
+namespace gol {
+
+class PaternPreview {
+public:
+  PaternPreview(std::shared_ptr<ctx>);
+  ~PaternPreview() = default;
+  void update();
+  void display();
+  void start();
+private:
+  bool is_started = false;
+  std::shared_ptr<ctx> context_;
+  Vector2 mouse_pos_ = {0, 0};
+};
+
+} // namespace gol