chore: bump vitest to v4 in examples and add explicit vitest v3 examp… #714

Job	Run time
check (codspeedhq-arm64-ubuntu-22.04)	1m 34s
List examples	7s
check (ubuntu-latest)	1m 26s
with-javascript-esm on Node 18	2m 7s
with-typescript-simple-cjs on Node 18	2m 19s
with-vitest-v3 on Node 20.5.1	1m 49s
with-typescript-cjs on Node 18	2m 18s
with-javascript-esm on Node 20.5.1	2m 15s
with-typescript-esm on Node 20.5.1	2m 27s
with-typescript-cjs on Node 20.5.1	2m 16s
with-vitest-v3 on Node 18	1m 43s
with-typescript-simple-cjs on Node 20.5.1	2m 23s
with-typescript-simple-esm on Node 20.5.1	2m 13s
with-typescript-simple-esm on Node 18	2m 30s
with-typescript-esm on Node 18	2m 34s
	30m 1s

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