Update README to include legacy C++ information

Added legacy context and links for the C++ version.

Author: githubrobbi

README.md

@@ -1,4 +1,8 @@
-# Ultra Fast File Search
+# Ultra Fast File Search (Legacy C++)
+
+> Legacy C++ predecessor to the current Rust UFFS engine.  
+> Active Rust development: https://github.com/skyllc-ai/UltraFastFileSearch  
+> Preserved for historical context, comparison, and regression reference.
 
 ------
 Ultra Fast File Search for Windows: Command-line tool for lightning-fast searches (non-commercial use only)
@@ -530,4 +534,4 @@ Adapted by Robert Nio on 2023-03-24
 Changes: Added an industrial-strength CLI interface and cleaned up the source code for better readability.
 
 Disclaimer:
-The original licensor, wfunction, does not endorse this adaptation or its use. This adapted work is licensed under the same Creative Commons Attribution Non-Commercial License 2.0. (https://creativecommons.org/licenses/by-nc/2.0/)
+The original licensor, wfunction, does not endorse this adaptation or its use. This adapted work is licensed under the same Creative Commons Attribution Non-Commercial License 2.0. (https://creativecommons.org/licenses/by-nc/2.0/)