chore: enable GitHub Sponsor button via FUNDING.yml

Author: yashab-cyber

.github/FUNDING.yml

@@ -0,0 +1,7 @@
+# These are supported funding model platforms
+# See: https://docs.github.com/en/repositories/managing-your-repositorys-settings-and-features/customizing-your-repository/displaying-a-sponsor-button-in-your-repository
+
+github: yashab-cyber
+custom:
+  - https://www.buymeacoffee.com/yashabalam
+  - https://paypal.me/yashabalam