Add sponsors section

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: spawnia

README.md

@@ -556,6 +556,10 @@ See [`CHANGELOG.md`](CHANGELOG.md).
 
 See [`CONTRIBUTING.md`](CONTRIBUTING.md).
 
+## Sponsors
+
+If Sailor saves you time, consider [sponsoring its development](https://github.com/sponsors/spawnia).
+
 ## License
 
 This package is licensed using the MIT License.