docs: add Product Hunt badge and references section

- add Product Hunt review badge to showcase user feedback
- introduce references section for better documentation structure

Signed-off-by: mingcheng <[email protected]>

Author: mingcheng

README.md

@@ -5,7 +5,11 @@
 
 ![screenshots](./assets/screenshots.png)
 
-A simple tool to help you write Git semantic commit messages using AI.
+`AIGitCommit` is a command-line tool that generates meaningful, semantic commit messages from your staged Git changes using AI. 
+
+It inspects your diffs, summarizes the intent of your changes, and produces clear, concise commit messages that follow the [Conventional Commits](https://www.conventionalcommits.org/en/v1.0.0/) specification.
+
+<a href="https://www.producthunt.com/products/aigitcommit/reviews?utm_source=badge-product_review&utm_medium=badge&utm_source=badge-aigitcommit" target="_blank"><img src="https://api.producthunt.com/widgets/embed-image/v1/product_review.svg?product_id=1047881&theme=dark" alt="AIGitCommit - A&#0032;simple&#0032;tool&#0032;to&#0032;help&#0032;you&#0032;write&#0032;better&#0032;Git&#0032;commit&#0032;messages&#0046; | Product Hunt" style="width: 250px; height: 54px;" width="250" height="54" /></a>
 
 ## References