initial AWS terraform (#180)

* initial AWS terraform

terraform/aws/variables.tf

@@ -0,0 +1,50 @@
+variable "name" {
+  type = string
+  description = "Name of your Constellation"
+}
+
+variable "worker_nodes_iam_instance_profile" {
+  type        = string
+  description = "Name of the IAM instance profile for worker nodes"
+}
+
+variable "control_plane_iam_instance_profile" {
+  type        = string
+  description = "Name of the IAM instance profile for control plane nodes"
+}
+
+variable "instance_type" {
+  type        = string
+  description = "Instance type for worker nodes"
+  default     = "t2.micro"
+}
+
+variable "disk_size" {
+  type        = number
+  description = "Disk size for nodes [GB]"
+  default     = 30
+}
+
+variable "count_control_plane" {
+  type        = number
+  description = "Number of control plane nodes"
+  default     = 1
+}
+
+variable "count_worker_nodes" {
+  type        = number
+  description = "Number of worker nodes"
+  default     = 1
+}
+
+variable "ami" {
+  type        = string
+  description = "AMI ID"
+  default     = "ami-02f3416038bdb17fb" // Ubuntu 22.04 LTS
+}
+
+variable "region" {
+  type        = string
+  description = "AWS region"
+  default     = "us-east-2"
+}