Implement Release Process

[No9]

There is no current release strategy for this repo but we have an initial build workflow in this PR
#3 (comment)
@takeshi-yoshimura do you have a point of view on a preferred release strategy and are you familiar with?
https://github.com/marketplace/actions/go-release-binaries

[takeshi-yoshimura]

We can publish the source code, but I am not sure if we also need to publish binaries. I expect that users use images in Packages (ghcr.io/ibm/core-dump-operator/*).