Integration workflow for terraform modules

### Feature Spec

Integration workflow for terraform code & modules :  
- Format  
- Linting  
- Configuration validation  
- Tests (Optional)  

### Use Cases

- Reusable module development  
- Code consistency & best practices enforcement   

### Implementation Notes

- tf fmt -check
- https://github.com/terraform-linters/setup-tflint  
- tf validate

### Components

Integration