docs: add Buy Me a Coffee donation and sponsor links

.github/FUNDING.yml

@@ -0,0 +1,3 @@
+# Supported funding model platforms
+
+buy_me_a_coffee: luisvillamg

README.md

@@ -4,6 +4,7 @@
 [![Python Versions](https://img.shields.io/badge/python-3.9%20%7C%203.10%20%7C%203.11%20%7C%203.12%20%7C%203.13-blue.svg)](https://pypi.org/project/AmazonAPIWrapper/)
 [![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](https://opensource.org/licenses/MIT)
 [![CI](https://github.com/lv10/amazonapi/actions/workflows/ci.yml/badge.svg)](https://github.com/lv10/amazonapi/actions/workflows/ci.yml)
+[![Buy Me a Coffee](https://img.shields.io/badge/Buy%20Me%20a%20Coffee-Donate-yellow.svg)](https://buymeacoffee.com/luisvillamg)
 
 A modern, high-performance, asynchronous and synchronous Python client for the Amazon Catalog APIs.
 
@@ -325,6 +326,16 @@ uv build
 
 ---
 
+## Support
+
+If you find this project helpful and want to support its maintenance and development, you can buy me a coffee:
+
+<a href="https://www.buymeacoffee.com/luisvillamg" target="_blank">
+  <img src="https://cdn.buymeacoffee.com/buttons/v2/default-yellow.png" alt="Buy Me A Coffee" height="42" width="180">
+</a>
+
+---
+
 ## License
 
 This project is licensed under the MIT License. See [LICENSE](LICENSE) for details.

pyproject.toml

@@ -47,6 +47,7 @@ Homepage = "https://github.com/lv10/amazonapi"
 Documentation = "https://github.com/lv10/amazonapi#readme"
 Repository = "https://github.com/lv10/amazonapi"
 Issues = "https://github.com/lv10/amazonapi/issues"
+Funding = "https://buymeacoffee.com/luisvillamg"
 
 [tool.hatch.build.targets.wheel]
 packages = ["amazon"]