Automatic publishing on crates.io

[popzxc]

We already have a few repositories that support automatic publishing on crates.io:

• https://github.com/matter-labs/zksync-crypto
• https://github.com/matter-labs/zksync-protocol
• https://github.com/matter-labs/zksync-crypto-gpu
• https://github.com/matter-labs/era-consensus/
• https://github.com/matter-labs/vm2/

Release workflow is custom and integrated with release-please.
What we want to do is:

• Unify the workflow so that it's reusable
• Utilize this workflow to automatically release crates from core workspace.

Releases for crates should be different from "normal" core releases, as they will have different cadence and versioning. The component can be called, for example, core-libs.

You may assume that all the crates are already correctly annotated (e.g. no-publish is set where it's required, and all the metadata fields are correct).

[antonbaliasnikov]

Status:

• Created open-sourced repository for common CI actions and workflows https://github.com/matter-labs/zksync-ci-common
• Added release-plz common workflow
• Prepared an integration example in ci: unified crates.io release workflow using release-plz zksync-protocol#78 with a simple workspace
• Tested complex integration example with multiple workspaces in https://github.com/antonbaliasnikov/release-pls-plz

[antonbaliasnikov]

PRs are ready for the following repositories:

• chore: unify release-please workflow vm2#83
• ci: unify release-please workflow zksync-crypto#78
• ci: use common rust release-please workflow zksync-protocol#83
• ci: unify release-please workflow zksync-crypto-gpu#79
• ci: unify release-please workflow era-consensus#232
• ci: add unified release please and crates.io publishing #3508
• ci: update release process with release-please anvil-zksync#549
• ci: update release process with release-please foundry-zksync#816

@popzxc , I will continue to monitor the stability of the workflows and fix any issues we see.
Do we have any other repositories that require this CI update?