fix: unref timers

[Nerivec]

Avoid holding the event loop with timers.
All of these are background ops, with low impact, so, shouldn't be a problem.
Might end up solving a few "weird" shutdown-related issues.

Also switched some "sleep" usage to the dedicated util.

Note: a further refactor could be improving the store and specifically properly cleaning up timers (currently buried in random objects) with a ZHC shutdown sequence.

[github-actions]

External review required

This PR modifies files that require review from their code owners before merging.

@candeodevelopment @dhc25:

• src/devices/candeo.ts

@InovelliUSA @rohankapoorcom:

• src/lib/inovelli.ts

Once reviewed, add the external-reviewer-approved label to unblock this check.

[Koenkk]

For convenience, maybe we can introduce a setTimeoutAndUnref?

[Nerivec]

Actually, we can chain it (returns self), cleaner than adding a wrapper.

[Koenkk]

Actually, we can chain it (returns self), cleaner than adding a wrapper.

Even cleaner indeed, thank!