feat: Enhance renamer app with help screen, rename confirmation, and special info formatting

renamer/formatters/special_info_formatter.py

@@ -0,0 +1,9 @@
+class SpecialInfoFormatter:
+    """Formatter for special info lists"""
+
+    @staticmethod
+    def format_special_info(special_info):
+        """Convert special info list to comma-separated string"""
+        if isinstance(special_info, list):
+            return ", ".join(special_info)
+        return special_info or ""