feat: update README.md

Author: KiritoEM

README.md

@@ -44,4 +44,16 @@ boolean-table expression "(a -> ~b) == (b | a)"
 | 0 | 1 | 1                    |
 | 1 | 0 | 1                    |
 | 1 | 1 | 0                    |
+
+OR With step:
+
+boolean-table expression "(a -> ~b) == (b | a)" --step
+
+# Truth table for (a -> ~b) == (b | a) with steps
+| a  | b  | ~b  | b | a | (a -> ~b) == (b | a) |
+|----|----|-----|----|---|---------------------|
+| 0  | 0  | 1   | 0  | 0 | 0                   |
+| 0  | 1  | 0   | 1  | 1 | 1                   |
+| 1  | 0  | 1   | 1  | 1 | 1                   |
+| 1  | 1  | 0   | 1  | 1 | 0                   |
 ```