add pictures of PR review in action

Author: 2bndy5

README.md

@@ -214,6 +214,18 @@ The total number of concerns raised by clang-format only.
 
 ![step summary](https://raw.githubusercontent.com/cpp-linter/cpp-linter-action/main/docs/images/step-summary.png)
 
+### Pull Request Review
+
+Using only clang-tidy (`tidy-review`):
+
+![sample tidy-review](https://raw.githubusercontent.com/cpp-linter/cpp-linter-action/main/docs/images/tidy-review.png)
+
+Using only clang-format (`format-review`):
+
+![sample format-review](https://raw.githubusercontent.com/cpp-linter/cpp-linter-action/main/docs/images/format-review.png)
+
+![sample tidy-review](https://raw.githubusercontent.com/cpp-linter/cpp-linter-action/main/docs/images/format-suggestion.png)
+
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 ## Add C/C++ Linter Action badge in README