Expose ssrFixStacktrace to application

[cendyne]

When an application uses an onError handler, the stack trace lines are incorrect. This is typically remedied with vite.ssrFixStacktrace, however as the vite server (https://github.com/honojs/vite-plugins/blob/main/packages/dev-server/src/dev-server.ts#L67) is not passed through the environment or context, it seems unreachable within an application hono handler.

If I throw it again from the onError handler, the vite dev server picks it up and gives an error response with the correct line numbers, suggesting that ssrFixStacktrace works when applied.