Read ca_chain

[mklimczuk]

I need to somehow get default issuer's CA certificate chain.
I found there is a method IVaultClient.V1.Secrets.PKI.ReadCACertificateAsync(CertificateFormat, string).
As far as I tested and checked the source code it allows me to get only the root certificate in PEM or DEF format, but CertificateFormat.pem_boundle is not really supported. I found there is an endpoint in Vault that returns the whole chain
GET v1/pki/ca_chain.

Link to the Vault API Docs that support this feature
The Vault Docs URL

Additional context
Currently, I have a workaround with simply just making the rest call, since it's not a protected resource and it's quite a strait forward, but maybe it would be valuable to introduce such functionality in the lib.
Is it somehow fitting to Your roadmap?