Switch from Jest to Vitest

[FloEdelmann]

To align with iD, see openstreetmap/iD#10452.

As a side-effect, the total number of dependencies goes down from 412 to 245 (-41%) and with that a vulnerability in the no longer needed transitive brace-expansion dependency is resolved.

For the coverage provider, we have two choices:

1. Istanbul (currently installed)
   Keeps the reported coverage exactly the same as with Jest (as that also used Istanbul), but increases the test duration from ~0.43s to ~0.89s on my machine.
2. v8
   Reports slightly larger coverage in build.js than Jest/Istanbul (74.12% vs. 73.77% statements, 64.10% vs. 63.78% branches), exactly the same coverage in the other files, but keeps test duration at ~0.49s on my machine.

I'm happy to switch to v8 if preferred.

[tyrasd]

I would say v8 is better suited for the use case of the schema-builder test suite. Can you please switch to it?