This will be useful for CSS random functions so it should be in a
reusable place.
This does require us to use `AK::get_random` instead of
`Crypto::get_secure_random`, but this is fine since the latter is in the
process of being removed (see #6564).
This commit adds support in AK/Random for a high quality RNG on windows.
This requires moving the code into a cpp file not to spread windows
headers around.
These changes are compatible with clang-format 16 and will be mandatory
when we eventually bump clang-format version. So, since there are no
real downsides, let's commit them now.
