mostly dev tooling updates, some linting updates, GHA updates

[nathanb]

No changes to core features included here. I'm just updating tooling mostly.

• Adding Node 24 to tests
• Changing default build/test runtime to 24
• Reworking GHA workflows to re-use shared workflows and simplify CI/CD (namely with versioning and publishing)
• Adding concurrency for versioning (so generic update PR's like this can publish and not break CI)
• Adding branch protection rules and allowing CI/CD to bypass
• tooling updates, but not mocha, and chai. (mocha is kind of stuck at 9 to support Node 10).
• Bringing in a much more streamlined eslint config factor that I use elsewhere and keep maintained more regularly.