feat: adds submodule to attaching organizations policy

Author: nimisha-gj

modules/policy_attachment/.header.md

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+# Terraform AWS Organizations Policy Attachement module
+A Terraform module for attaching policies to organizational unit or accounts

modules/policy_attachment/README.md

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+# Terraform AWS Organizations Policy Attachement module
+A Terraform module for attaching policies to organizational unit or accounts
+
+## Requirements
+
+| Name | Version |
+|------|---------|
+| <a name="requirement_terraform"></a> [terraform](#requirement\_terraform) | >= 1.4.6 |
+| <a name="requirement_aws"></a> [aws](#requirement\_aws) | >= 4.65.0 |
+
+## Providers
+
+| Name | Version |
+|------|---------|
+| <a name="provider_aws"></a> [aws](#provider\_aws) | >= 4.65.0 |
+
+## Modules
+
+No modules.
+
+## Resources
+
+| Name | Type |
+|------|------|
+| [aws_organizations_policy_attachment.this](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/organizations_policy_attachment) | resource |
+
+## Inputs
+
+| Name | Description | Type | Default | Required |
+|------|-------------|------|---------|:--------:|
+| <a name="input_policy_id"></a> [policy\_id](#input\_policy\_id) | (Required) The unique identifier (ID) of the policy that you want to attach to the target. | `string` | n/a | yes |
+| <a name="input_skip_destroy"></a> [skip\_destroy](#input\_skip\_destroy) | (Optional) If set to true, destroy will not detach the policy and instead just remove the resource from state. | `bool` | `false` | no |
+| <a name="input_target_id"></a> [target\_id](#input\_target\_id) | (Required) The unique identifier (ID) of the root, organizational unit, or account number that you want to attach the policy to. | `string` | n/a | yes |
+
+## Outputs
+
+No outputs.

modules/policy_attachment/main.tf

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+resource "aws_organizations_policy_attachment" "this" {
+  policy_id    = var.policy_id
+  target_id    = var.target_id
+  skip_destroy = var.skip_destroy
+}

modules/policy_attachment/outputs.tf

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+variable "policy_id" {
+  description = "(Required) The unique identifier (ID) of the policy that you want to attach to the target."
+  type        = string
+}
+
+variable "target_id" {
+  description = "(Required) The unique identifier (ID) of the root, organizational unit, or account number that you want to attach the policy to."
+  type        = string
+}
+
+variable "skip_destroy" {
+  description = "(Optional) If set to true, destroy will not detach the policy and instead just remove the resource from state."
+  type        = bool
+  default     = false
+}

modules/policy_attachment/variables.tf

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+terraform {
+  required_version = ">= 1.4.6"
+
+  required_providers {
+    aws = {
+      source  = "hashicorp/aws"
+      version = ">= 4.65.0"
+    }
+  }
+}