Support for Google Sheets with duplicate headers

The idea is:

To accept this PR: handle duplicate column names (fixes #13487) by icarito · Pull Request #13488 · n8n-io/n8n · GitHub

My use case:

I have to process a sheet with duplicate column headers

I think it would be beneficial to add this because:

How else is a user going to deal with this if he doesn’t have access to alter the original sheet?

Any resources to support this?

Are you willing to work on this?