add readme and output

README.md

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+# Terraform AWS VPC Module
+
+This Terraform module creates an AWS Virtual Private Cloud (VPC) along with public and private subnets, Internet Gateway, NAT Gateway, and relevant route tables.
+
+## Usage
+
+```hcl
+provider "aws" {
+  region = "us-west-2"
+}
+
+module "vpc" {
+  source = "./"
+  
+  vpc_cidr_block = "10.0.0.0/16"
+  
+  public_subnet_cidr_blocks = ["10.0.1.0/24", "10.0.2.0/24", "10.0.3.0/24"]
+  
+  private_subnet_cidr_blocks = ["10.0.11.0/24", "10.0.12.0/24", "10.0.13.0/24"]
+  
+  region = "us-west-2"
+  
+  availability_zones = ["us-west-2a", "us-west-2b", "us-west-2c"]
+}
+```
+## Inputs
+| Name                      | Description                                               | Type         | Default | Required |
+|---------------------------|-----------------------------------------------------------|--------------|---------|----------|
+| vpc_cidr_block            | CIDR block for the VPC                                    | string       |         | Yes      |
+| public_subnet_cidr_blocks | CIDR blocks for the public subnets                        | list(string) |         | Yes      |
+| private_subnet_cidr_blocks| CIDR blocks for the private subnets                       | list(string) |         | Yes      |
+| region                    | AWS region                                                | string       |         | Yes      |
+| availability_zones        | List of availability zones in the region                 | list(string) |         | Yes      |
+
+## Outputs
+| Name                          | Description                                       |
+|-------------------------------|---------------------------------------------------|
+| vpc_id                        | The ID of the VPC created by this module.        |
+| public_subnet_ids             | List of IDs of the public subnets.               |
+| private_subnet_ids            | List of IDs of the private subnets.              |
+| public_subnet_cidr_blocks     | List of CIDR blocks of the public subnets.       |
+| private_subnet_cidr_blocks    | List of CIDR blocks of the private subnets.      |
+| internet_gateway_id           | The ID of the Internet Gateway.                  |
+| nat_gateway_ids               | List of IDs of the NAT Gateways.                 |

outputs.tf

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+# outputs.tf
+
+output "vpc_id" {
+  description = "The ID of the VPC created by this module."
+  value       = module.vpc.vpc_id
+}
+
+output "public_subnet_ids" {
+  description = "List of IDs of the public subnets."
+  value       = module.vpc.public_subnet_ids
+}
+
+output "private_subnet_ids" {
+  description = "List of IDs of the private subnets."
+  value       = module.vpc.private_subnet_ids
+}
+
+output "public_subnet_cidr_blocks" {
+  description = "List of CIDR blocks of the public subnets."
+  value       = module.vpc.public_subnet_cidr_blocks
+}
+
+output "private_subnet_cidr_blocks" {
+  description = "List of CIDR blocks of the private subnets."
+  value       = module.vpc.private_subnet_cidr_blocks
+}
+
+output "internet_gateway_id" {
+  description = "The ID of the Internet Gateway."
+  value       = module.vpc.internet_gateway_id
+}
+
+output "nat_gateway_ids" {
+  description = "List of IDs of the NAT Gateways."
+  value       = module.vpc.nat_gateway_ids
+}