Include notice about project sustainability and support

Added a notice from the project owner regarding financial support and service sustainability.

Author: ryo-ma

README.md

@@ -21,6 +21,22 @@
   </a>
 </div>
 
+
+> ⚠️ **Notice from the Project Owner**
+>
+> Hello everyone,  
+> I am the owner of this project.  
+>
+> Currently, due to the increase in users and traffic, the cost of maintaining this service has become quite high, and it is becoming financially difficult to sustain.  
+> As costs continue to rise, there is a possibility that the service may have to be discontinued.  
+> We are now at a stage where monetization and financial support are essential.  
+>
+> Your support in the following ways would be greatly appreciated:  
+>
+> 1. Financial support: [GitHub Sponsors](https://github.com/sponsors/ryo-ma)  
+> 2. Reducing server load through self-hosting (by forking on GitHub and deploying to Vercel)  
+
+
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