Setup build and release process

[remyroy]

Setup a solid build and release process for the initial ethstaker-deposit-cli release.

[remyroy]

Part of this was done in #28.

A Linux arm64 build would be nice. Circleci might be the way to go here until arm64 runners are added to Github.

[yorickdowne]

Github-hosted Linux arm64 runners are now in public beta, but not for plebs. Enterprise and Team accounts only, for now.

https://github.blog/changelog/2024-06-03-actions-arm-based-linux-and-windows-runners-are-now-in-public-beta/

[remyroy]

It could be a good enough reason for us to buy a Github package and get this.

[remyroy]

Our setup and release process is much better now with the build workflow on Github. We also now support the linux on ARM64 platform. What's mostly remaining for me would be to document how to perform a proper release and add Windows on ARM support which is blocked by having a good runner image with build tools installed.