Update README

Author: ArjArav98

README.md

@@ -107,6 +107,7 @@ The workings of the Sudoku Validator are quite simple, to be honest. Here's a si
 ## Future Direction
 
 * Right now, the Sudoku Solver Suite is just a CLI application with a I/O interface. However, if we could make it into a CLI utility which takes in inputs through parameters and switches, that would make it easier for other developers to reuse.
+* I was thinking we could write a "backend" which could then be called by various "interface frontends". The backend is written in C++ and the frontends could be shell or maybe an API or something.
 
 ## Acknowledgements