Use vitest instead of jest

[IrvingWash]

Vitest is faster, more modern and convenient.
May I create a pull request?

[ya7on]

Thank for your attention to project.
I am 100% okay with your proposal, but actually jest was added by default in Blueprint (tool i used for creating project structure). I afraid there will be some issues with migrating to another test library. Blueprint add @ton/test-utils dependency where are some utils for testing smart contracts (e.g. finding transaction by filter, lines below show example of using toHaveTransaction from this dependency)

skipper/tests/Skipper.spec.ts

Lines 30 to 45 in 71c29b3

	const deployResult = await skipper.send(
	deployer.getSender(),
	{
	value: toNano('0.05'),
	},
	{
	$$type: 'Deploy',
	queryId: 0n,
	}
	);
	expect(deployResult.transactions).toHaveTransaction({
	from: deployer.address,
	to: skipper.address,
	deploy: true,
	success: true,
	});

I mean, if it won't be a problem for you and won't take much time. At first look it is not such a simple task