refactor module with all the required files

modules/add-ons/adot-operator/variables.tf

@@ -0,0 +1,36 @@
+variable "helm_config" {
+  description = "Helm provider config for ADOT Operator AddOn"
+  type        = any
+  default     = {}
+}
+
+variable "addon_context" {
+  description = "Input configuration for the addon"
+  type = object({
+    aws_caller_identity_account_id = string
+    aws_caller_identity_arn        = string
+    aws_eks_cluster_endpoint       = string
+    aws_partition_id               = string
+    aws_region_name                = string
+    eks_cluster_id                 = string
+    eks_oidc_issuer_url            = string
+    eks_oidc_provider_arn          = string
+    irsa_iam_role_path             = string
+    tags                           = map(string)
+  })
+}
+
+variable "enable_cert_manager" {
+  type    = bool
+  default = true
+}
+
+variable "kubernetes_version" {
+  type = string
+}
+
+variable "addon_config" {
+  description = "Amazon EKS Managed CoreDNS Add-on config"
+  type        = any
+  default     = {}
+}