AK/LibJS/LibCrypto: implement random for Windows

[R-Goc]

This commit implements a high quality randomness source for AK/Random. This avoids the fallback to rand(). The LibJS math xoshiro128+ prng is now seeded with SecureRandom. A convenience get_secure_random method was added to SecureRandom to directly construct the requested type.

[ladybird-bot]

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[R-Goc]

ASAN not complaining is encouraging but I don't think the fallback which I'm worried about actually has any code coverage.

[R-Goc]

I also wonder if marking advance in xorshift always inline along with get wouldn't be useful.

[github-actions[bot]]

This pull request has been automatically marked as stale because it has not had recent activity. It will be closed in 7 days if no further activity occurs. Thank you for your contributions!

[R-Goc]

unstale