feat: use setup-node and checkout actions v4

[JoeyDoey]

• use setup-node and checkout actions v4 (bedframe repo + generated mvp.yml workflow)
• purge unused codemod code
• code clean up

[changeset-bot[bot]]

⚠️ No Changeset found

Latest commit: ccf0d3d1de040f86fa19db588ec0b42e1060fb76

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