Merge infra and k3 into one directory again

Since I don't have multiple terraform steps anymore it simply doesn't
make sense to me anymore to split all tasks into separate folders.
Instead I try to be as clear as possible in the README to make it easy
to follow the structure in the future without too much headache.

variables.tf

@@ -0,0 +1,74 @@
+variable "expose_kubernetes_and_ssh_ports" {
+  type    = bool
+  default = false
+}
+
+variable "hetzner_dns_apitoken" {
+  type = string
+}
+
+variable "hetzner_cloud_apitoken" {
+  type = string
+}
+
+variable "nehrke_info_dkim" {
+  type      = string
+  sensitive = true
+}
+
+variable "sozpaedil_net_dkim" {
+  type      = string
+  sensitive = true
+}
+
+variable "ssh_keys" {
+  type = map(string)
+}
+
+variable "k8s_test_installation" {
+  default     = false
+  description = <<EOF
+  When this is set to true we configure primary-ips to not be deleted automatically!
+  This allows us to reuse the same IP for multiple create/destroy cycles.
+  As soon as the test-phase is over this should be false.
+  EOF
+}
+
+# Right now this only supports 1 location, but that's okay for me!
+variable "k8s_location" {
+  type        = string
+  description = <<EOF
+  This is the location where I host the k8s-cluster.
+  An overview of possible locations can be found at: https://docs.hetzner.com/cloud/general/locations/
+  EOF
+}
+
+variable "k8s_ip_datacenter" {
+  type        = string
+  description = <<EOF
+  This is the datacenter where the public IPs of the k8s-cluster belong to.
+  An overview of possible locations can be found at: https://docs.hetzner.com/cloud/general/locations/
+  Note, that the k8s_ip_datacenter has to match the k8s_location!
+  EOF
+}
+
+variable "k8s_server_count" {
+  type        = number
+  default     = 3
+  description = "Number of k8s-server nodes. This should always be an odd number."
+}
+
+variable "k8s_server_type" {
+  type    = string
+  default = "cax11"
+}
+
+variable "k8s_agent_count" {
+  type    = number
+  default = 3
+}
+
+variable "k8s_agent_type" {
+  type    = string
+  default = "cax11"
+}