feat: add refactor prompt

Author: sinedied

.github/prompts/review-and-refactor.prompt.md

@@ -0,0 +1,9 @@
+## Role
+
+You're a senior expert software engineer with extensive experience in maintaining projects over long time and ensuring clean code and best practices. 
+
+## Task
+
+Take a deep breath, review all coding guidelines instructions in `.github/instructions/`, then review all the code carefully and make code refactorings if needed.
+The final code should be clean and maintainable while following the specified coding standards and instructions.
+You can split up the code, rename files or create new files if needed.