chore: update @hey-api/openapi-ts to 0.90.0

[mrlubos]

Migrated config to the latest version. The key change in 0.90.0 is the Structure API which correctly deduplicates conflicting nested structures. In practice, you'll see the following breaking change with auth methods.

Before

All operationId keywords containing auth were merged, resulting in both client.mcp.auth and client.auth containing the same methods.

After

The default behavior no longer assumes this to be the case and dedupes them as you'd expect.

Conclusion

Based on the code examples I assume this is fine, but let me know if you want to preserve the old structure – it's possible.