Implement Role-Based Access Control (RBAC) with Terraform

## Dependencies
- The efforts from #627 will check off some items in this issue
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- Parent Issue #774

### Overview
This issue focuses on implementing and managing Role-Based Access Control (RBAC) at the infrastructure level using Terraform. The goal is to create a modular, reusable, and well-documented RBAC setup that aligns with our effort to improve code readability and accessibility for junior developers.

### Action Items
1. **Define and Implement RBAC Roles and Policies**
- [ ] Identify the roles and permissions required for the infrastructure.
- [ ] Implement these roles and policies using Terraform.

2. **Modularize Terraform Configurations**
- [ ] Ensure that the RBAC configurations are modular and reusable across different environments.
- [ ] Refactor existing Terraform code, if necessary, to improve modularity.

3. **Documentation**
- [ ] Document the Terraform-based RBAC setup with a focus on clarity and accessibility for junior developers.
- [ ] Include examples and guidelines for maintaining and extending the RBAC configuration.

4. **Testing and Validation**
- [ ] Test the Terraform RBAC implementation in a staging environment.
- [ ] Conduct security audits to ensure that roles and permissions are correctly enforced.

### Resources/Instructions
A secure, modular, and well-documented Terraform-based RBAC setup that is easy for junior developers to understand and maintain.