Remove Hetzner Cloud Terraform provider version 1.57.0 and associated resources

- Deleted the LICENSE file for the Hetzner Cloud Terraform provider.
- Removed the README.md file for the Hetzner Cloud Terraform provider.
- Deleted the compiled provider binary (terraform-provider-hcloud_v1.57.0.exe).
- Removed Terraform configuration files related to the Hetzner FTP server, production firewall, production network, and NetBox cluster.
- Deleted provider configuration in provider.tf, including required providers and sensitive variables.

terraform/provider.tf

@@ -1,39 +0,0 @@
-terraform {
-  required_providers {
-    hcloud = {
-      source = "hetznercloud/hcloud"
-      version = "1.57.0"
-    }
-    netbox = {
-      source = "e-breuninger/netbox"
-      version = "5.0.0"
-    }
-  }
-}
-
-variable NETBOX_API_TOKEN {
-  type        = string
-  description = "netbox api token"
-  sensitive   = true
-}
-
-variable NETBOX_SERVER_URL {
-  type        = string
-  description = "netbox Server URL"
-  sensitive   = true
-}
-
-variable HETZNER_API_TOKEN {
-  type        = string
-  description = "hetzner cloud api token"
-  sensitive   = true
-}
-
-provider "netbox" {
-  server_url   = var.NETBOX_SERVER_URL
-  api_token = var.NETBOX_API_TOKEN
-}
-
-provider "hcloud" {
-  token = var.HETZNER_API_TOKEN
-}