docs: adds sponsor link

Author: marabesi

README.md

@@ -6,6 +6,8 @@
 Are you tired of accessing **free websites just to format your json content**? Me too. Besides the "data protection"
 issue sometimes we just want to have it formatted to move on.
 
+[![Sponsor](https://img.shields.io/badge/Sponsor-❤️-ff69b4?style=for-the-badge&logo=github)](https://github.com/sponsors/marabesi)   
+
 [![Youtube Video](https://github.com/user-attachments/assets/b98ab111-0ad1-493e-be53-135620a81d2a)](https://www.youtube.com/watch?v=IhCSsIGQ7YQ)
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