feat: create Github.com releases or at least push git tags here for each release

[davidxia]

Currently I have to run the following CLI commands to get the latest versions. Creating Github.com releases or at least pushing git tags here for each release makes it a lot easier to browse releases.

# first I have to refresh credentials with SSO
$ aws sso login ...

$ aws ecr list-images --registry-id 602401143452 --repository-name eks/eks-node-monitoring-agent | jq -r .imageIds[].imageTag | sort -hr | head
v1.4.0-eksbuild.2-linux_arm64
v1.4.0-eksbuild.2-linux_amd64
v1.4.0-eksbuild.2
v1.4.0-eksbuild.1-linux_arm64
v1.4.0-eksbuild.1-linux_amd64
v1.4.0-eksbuild.1
v1.3.0-eksbuild.2-linux_arm64
v1.3.0-eksbuild.2-linux_amd64
v1.3.0-eksbuild.2
v1.3.0-eksbuild.1-linux_arm64