[Infra] Automatically add the `consensus-breaking` label

[Olshansk]

Objective

Easily track which changes (and releases) are consensus breaking.

Origin Document

Goals

• Make it easy to track which releases are consensus breaking

Deliverables

• [ ] A GitHub CI workflow that adds the consensus-breaking label automatically when:
  • [ ] Anything under x/ is modified
  • [ ] Anything that under x/ imports changes

Non-goals / Non-deliverables

• Having complex business logic that gives a 100% guarantee

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Creator: @Olshansk Co-Owners: @okdas

[okdas]

Ha-ha, I looked into that yesterday! Not a very trivial thing to do, but doable. I believe it will be needed for a Beta TestNet.

[Olshansk]

@okdas Can you just leave your ideas here so someone in the community can build it?