feat: Terraform Foundation - AWS Landing Zone

Enterprise-grade multi-tenant AWS cloud foundation.

Modules:
- GitHub OIDC for keyless CI/CD authentication
- IAM account settings and security baseline
- AWS Config Rules for compliance
- ABAC (Attribute-Based Access Control)
- SCPs (Service Control Policies)

Features:
- Multi-account architecture
- Cost optimization patterns
- Security best practices
- Comprehensive documentation

Tech: Terraform, AWS Organizations, IAM Identity Center

terraform/modules/cloudwatch-dashboard/README.md

@@ -0,0 +1,49 @@
+# cloudwatch-dashboard
+
+CloudWatch Dashboard Module
+
+## Usage
+
+```hcl
+module "cloudwatch_dashboard" {
+  source = "../modules/cloudwatch-dashboard"
+  
+  # Required variables
+  name = ""
+
+  # Optional: see variables.tf for all options
+}
+```
+
+## Requirements
+
+| Name | Version |
+|------|---------|
+| terraform | >= 1.5.0 |
+| aws | >= 5.0 |
+
+## Inputs
+
+| Name | Description | Type | Required |
+|------|-------------|------|----------|
+| name | Dashboard name | `string` | yes |
+| ecs_clusters | ECS cluster names to monitor | `list(string)` | no |
+| ecs_services | ECS service names to monitor | `list(string)` | no |
+| rds_instances | RDS instance identifiers | `list(string)` | no |
+| lambda_functions | Lambda function names | `list(string)` | no |
+| alb_arns | ALB ARN suffixes (app/name/id) | `list(string)` | no |
+| api_gateway_apis | API Gateway API IDs | `list(string)` | no |
+| sqs_queues | SQS queue names | `list(string)` | no |
+| dynamodb_tables | DynamoDB table names | `list(string)` | no |
+| tags |  | `map(string)` | no |
+
+## Outputs
+
+| Name | Description |
+|------|-------------|
+| dashboard_name |  |
+| dashboard_arn |  |
+
+## License
+
+Apache 2.0 - See LICENSE for details.