Rename and reorganize scripts and configuration files for clarity. Updated `02_install_cert_manager.sh` to reference a new Helm values file for better configurability. Introduced nodeSelector and tolerations in `helm-values/cert-manager.yaml` for targeted deployment.
Introduces custom `metallb.yaml` Helm values with node selectors and tolerations targeting specific nodes. Renames and adjusts MetalLB resource file, removing unused IPs. Updates installation script to apply the new Helm values and handle namespace creation idempotently.
