docs(readme): add Example Usages section

README.md

@@ -8,6 +8,26 @@ Compile and test solutions to [LeetCode](https://leetcode.com/) problems on GitH
 | ------- | ---------------- | ---------------------------------------------------------------------------------- |
 | `files` | Multiple strings | A list of pattern for solution files to process. It defaults to `**/solution.cpp`. |
 
+## Example Usages
+
+This example demonstrates how to use this action to compile and test solutions to LeetCode problems in a GitHub Actions workflow:
+
+```yaml
+name: Test
+on:
+  push:
+jobs:
+  test-solutions:
+    name: Test Solutions
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4.1.2e
+
+      - name: Test Solutions
+        uses: threeal/leettest-action@v0.2.0
+```
+
 ## License
 
 This project is licensed under the terms of the [MIT License](./LICENSE).