Docs added for EMR on EKS module

docs/add-ons/agones.md

docs/add-ons/aws-for-fluent-bit.md

docs/add-ons/aws-load-balancer-controller.md

docs/add-ons/aws-open-telemetry.md

docs/add-ons/cert-manager.md

docs/add-ons/cluster-autoscaler.md

docs/add-ons/fargate-fluent-bit.md

docs/add-ons/index.md

docs/add-ons/managed-add-ons.md

docs/add-ons/metrics-server.md

docs/add-ons/nginx.md

docs/add-ons/open-telemetry.md

docs/add-ons/prometheus.md

docs/add-ons/traefik.md

docs/add-ons/windows-vpc-controllers.md

docs/cluster-upgrades.md

docs/ecr-instructions.md

docs/modules/emr-on-eks.md

mkdocs.yml

modules/emr-on-eks/README.md