add data source hetznerdns_records

[l-with]

add data source hetznerdns_records

this will make it possible to use the terraform provider also in projects that need the information of dns records

[kimdre]

Hi, we created a new fork of this project as this one is no longer maintained and added a bunch of additional features including data sources.
You can find it here: https://registry.terraform.io/providers/germanbrew/hetznerdns/latest/docs