chore: enhance contribution guidelines for pull requests

CONTRIBUTING.md

@@ -0,0 +1,32 @@
+## Hi! I would be very happy if you could help develop this project. It is very important to me.
+
+### Before submitting a pull request, please follow these rules:
+
+1. **Commit Prefixes**: Check the correctness of the commit prefixes. Choose the most appropriate prefix for your changes by referring to the `commitlint.config.js` file.
+2. **Code Quality**: Ensure that your code adheres to the formatting and linting rules:
+   - Run the following commands to check and fix code formatting before submitting:
+     - To check formatting:
+       ```bash
+       npm run prettier
+       ```
+     - To fix formatting:
+       ```bash
+       npm run prettier:fix
+       ```
+     - To check linting:
+       ```bash
+       npm run lint
+       ```
+     - To fix linting issues:
+       ```bash
+       npm run lint:fix
+       ```
+3. **Tests**: Make sure all tests pass successfully. You can run the tests with:
+
+   ```bash
+   npm run test
+   ```
+
+---
+
+### Thank you for your contributions! I appreciate your effort in maintaining the quality of this project!!