chores: upgrade to node 20

[raphaelcoeffic]

Summary of changes:

• updated Node.js to 20.x.
• updated vitest to latest.
• updated ky to latest (and removed ky-universal, as Node 18+ provides native support for fetch API).
• updated nock to 14.0.0-beta5 to add support for fetch API (please note that recording is NOT supported).
• updated electron and electron-builder to latest (electron-rebuild removed on the way).
• a few more minor updates...

Fixes #60.

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[raphaelcoeffic]

@freshollie it's ready for your review at your earliest convenience.

Regarding next steps, I think we should probably then start updating the rest of the stack (React, components, etc). Then we could probably start tackling new features (SD card, Cloudbuild FW download, etc).

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[freshollie]

Minor points but really amazing job thanks so much!

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[pfeerick]

Nothing is standing out as problematic, and has had some testing already (Win11). Online preview build seemed to be working fine.