feat/CD

[monyarm]

• feat(deploy-spec): deploy-spec package
• feat(ci-matrix): generate cachix spec
• feat(GH-actions): add optional deployment to ci.yml
• temp(GH-actions): use feat/CD for reusable workflows instead of main

[github-actions]

Thanks for your Pull Request!

Below you will find a summary of the cachix status of each package, for each supported platform.

package	x86_64-linux	x86_64-darwin	aarch64-darwin
folder-size-metrics	✅ cached	🚫 not supported	🚫 not supported
grafana-agent	✅ cached	✅ cached	✅ cached
lido-withdrawals-automation	✅ cached	✅ cached	✅ cached
mcl	✅ cached	🚫 not supported	🚫 not supported
nix-fast-build	✅ cached	🚫 not supported	🚫 not supported
pyroscope	✅ cached	✅ cached	✅ cached
validator-ejector	✅ cached	🚫 not supported	🚫 not supported