docs(pylon.md): add bun requirement disclaimer (#470)

* Update pylon.md: Add bun requirement disclaimer

Hey @yusukebe.

I want to add a disclaimer to figure out if the bun requirement of pylon is a dealbreaker for the community.

I am already working on a solution to support the same runtimes as Hono.

I just want to validate this feature. Could you share your personal opinion on this matter?

* Update examples/pylon.md

* Update examples/pylon.md

* Update examples/pylon.md

examples/pylon.md

@@ -1,5 +1,9 @@
 # Pylon
 
+::: warning
+**Pylon Requires Bun:** This project currently depends on the [Bun runtime](https://bun.sh). If you need support for a different runtime, please upvote and follow the discussion on issue https://github.com/getcronit/pylon/issues/6 to help us prioritize it.
+:::
+
 Building a GraphQL API with Pylon is simple and straightforward. Pylon is a backend framework that is built on top of Hono and provides code-first GraphQL API development.
 
 The GraphQL schema is generated in real-time from your TypeScript definitions, allowing you to focus solely on writing your service logic. This approach significantly improves development speed, enhances type safety, and reduces errors.