chore(funding): update FUNDING.yml to include ko-fi sponsorship option and improve formatting

docs(readme): enhance sponsorship section in README to encourage donations and support

.github/FUNDING.yml

@@ -1 +1,3 @@
-custom: ["ko-fi.com/workoutcool", "buymeacoffee.com/workout_cool"]
+ko_fi: workoutcool
+custom:
+  - buymeacoffee.com/workout_cool

README.md

@@ -268,6 +268,8 @@ This project is licensed under the MIT License - see the [LICENSE](LICENSE) file
 
 ## 💖 Sponsor This Project
 
+Appear in the README and on the website as supporter by donating:
+
 <div align="center">
   <a href="https://ko-fi.com/workoutcool" target="_blank">
     <img src="https://ko-fi.com/img/githubbutton_sm.svg" alt="Sponsor on Ko-fi" />