Feature/add acr container registry

[Lusengeri]

PR Title: Add Azure Container Registry (ACR) with AKS Integration

Summary

This PR introduces an Azure Container Registry (ACR) with a Standard SKU and integrates it with the existing AKS cluster for seamless image pulls. Additionally, a service principal access token is created for GitHub Actions workflows with push permissions enabled.

Addresses #60 & #80

Changes

• Created an Azure Container Registry (ACR) with a Standard SKU.
• Configured AKS pull permissions by assigning the azurerm_kubernetes_cluster.ifrcgo.kubelet_identity[0].object_id attribute to the ACR role-based access control (RBAC), allowing the AKS kubelet identity to pull images without explicit secrets.
• Generated an ACR access token with push permissions for use in GitHub Actions workflows.

Why this is needed

• Enhances security by allowing AKS to pull images without storing credentials.
• Simplifies authentication for GitHub Actions, enabling automated container image pushes to ACR.
• Ensures best practices by leveraging Azure-native identity-based access management.

Next Steps

• Update GitHub Actions workflows to use the ACR token for image pushes.
• Validate AKS workloads successfully pull images from the registry.