Update Node to v24.x and align GitHub Actions in use#59

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fedtti wants to merge 1 commit intoarduino:mainfrom

Commits on Oct 14, 2025

chore: remove Node v12.x as a development dependency, update actions/setup-node to v6 (that fits actions/checkout@v5), update README.md to reflect the GitHub Actions in use, update packages to Node…
fedtti
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