Add Python greeting function

Add a reusable function that returns a personalized greeting

Author: Vishnu01113

greeting.py

@@ -0,0 +1,7 @@
+def greet_user(name):
+    """Return a greeting for the given user."""
+    return f"Hello, {name}! Welcome to our project."
+
+
+if __name__ == "__main__":
+    print(greet_user("Student"))