fix: mark hetznerdns provider as deprecated and update documentation (#283)

Signed-off-by: Kim Oliver Drechsel <kim@drechsel.xyz>

Author: kimdre

README.md

@@ -1,4 +1,9 @@
-# Terraform Provider for Hetzner DNS
+# Terraform Provider for Hetzner DNS (Deprecated)
+
+> [!CAUTION]
+> This provider is deprecated as of 10 Nov 2025.
+> Please migrate to the official [Hetzner Cloud Terraform Provider](https://registry.terraform.io/providers/hetznercloud/hcloud/latest)
+> which now also supports managing DNS records since version [1.54.0](https://github.com/hetznercloud/terraform-provider-hcloud/releases/tag/v1.54.0).
 
 [![Terraform](https://img.shields.io/badge/Terraform-844FBA.svg?style=for-the-badge&logo=Terraform&logoColor=white)](https://registry.terraform.io/providers/germanbrew/hetznerdns/latest)
 [![OpenTofu](https://img.shields.io/badge/OpenTofu-FFDA18.svg?style=for-the-badge&logo=OpenTofu&logoColor=black)](https://search.opentofu.org/provider/germanbrew/hetznerdns/latest)

docs/index.md

@@ -3,11 +3,13 @@
 page_title: "hetznerdns Provider"
 description: |-
   This providers helps you automate management of DNS zones and records at Hetzner DNS.
+  WARNING: This provider is deprecated as of 10 Nov 2025 with the release of the hcloud Console DNS, please migrate to the official Hetzner hcloud provider
 ---
 
 # hetznerdns Provider
 
-This providers helps you automate management of DNS zones and records at Hetzner DNS.
+This providers helps you automate management of DNS zones and records at Hetzner DNS. 
+WARNING: This provider is deprecated as of 10 Nov 2025 with the release of the hcloud Console DNS, please migrate to the official Hetzner hcloud provider
 
 ## Example Usage
 

internal/provider/provider.go

@@ -52,7 +52,9 @@ func (p *hetznerDNSProvider) Metadata(_ context.Context, _ provider.MetadataRequ
 
 func (p *hetznerDNSProvider) Schema(_ context.Context, _ provider.SchemaRequest, resp *provider.SchemaResponse) {
 	resp.Schema = schema.Schema{
-		Description: "This providers helps you automate management of DNS zones and records at Hetzner DNS.",
+		Description: "This providers helps you automate management of DNS zones and records at Hetzner DNS. \n" +
+			"WARNING: This provider is deprecated as of 10 Nov 2025 with the release of the hcloud Console DNS, " +
+			"please migrate to the official Hetzner hcloud provider",
 		Attributes: map[string]schema.Attribute{
 			"api_token": schema.StringAttribute{
 				Description: "The Hetzner DNS API token. You can pass it using the env variable `HETZNER_DNS_TOKEN` as well. " +