Add info to README.md

Author: WendellAdriel

README.md

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+<div align="center">
+    <p>
+        <h1>Cache TTL Helper</h1>
+        Helper Enum for handling cache TTLs in a simple, easy and friendly way
+    </p>
+</div>
+
+<p align="center">
+<a href="https://packagist.org/packages/WendellAdriel/cache-ttl-helper"><img src="https://img.shields.io/packagist/v/WendellAdriel/cache-ttl-helper.svg?style=flat-square" alt="Packagist"></a>
+<a href="https://packagist.org/packages/WendellAdriel/cache-ttl-helper"><img src="https://img.shields.io/packagist/php-v/WendellAdriel/cache-ttl-helper.svg?style=flat-square" alt="PHP from Packagist"></a>
+<a href="https://github.com/WendellAdriel/cache-ttl-helper/actions"><img alt="GitHub Workflow Status (main)" src="https://img.shields.io/github/actions/workflow/status/WendellAdriel/cache-ttl-helper/tests.yml?branch=main&label=Tests"> </a>
+</p>
+
+## Installation
+
+```bash
+composer require wendelladriel/cache-ttl-helper
+```
+
+## Usage
+
+This package provides a simple Enum class with some helper methods to handle cache TTLs in a simple, easy and friendly way.
+
+All methods are static, and they all return the TTL in seconds.
+
+### Methods available
+
+```php
+use WendellAdriel\CacheTtlHelper\CacheTTL;
+
+CacheTTL::second(); // 1s
+CacheTTL::seconds(30); // 30s
+
+CacheTTL::minute(); // 60s
+CacheTTL::minutes(5); // 300s
+
+CacheTTL::hour(); // 3600s
+CacheTTL::hours(2); // 7200s
+
+CacheTTL::day(); // 86400s
+CacheTTL::days(3); // 259200s
+
+CacheTTL::week(); // 604800s
+CacheTTL::weeks(2); // 1209600s
+
+CacheTTL::month(); // 2592000s
+CacheTTL::months(6); // 15552000s
+
+CacheTTL::year(); // 31536000s
+CacheTTL::years(2); // 63072000s
+```
+
+## Credits
+
+- [Wendell Adriel](https://github.com/WendellAdriel)
+- [All Contributors](../../contributors)
+
+## Contributing
+
+Check the **[Contributing Guide](CONTRIBUTING.md)**.