docs: add fault injection scripts and docs

[X1pster]

Запуск скрипта krf_vm.sh на Open Suse 15.6:

suser@localhost:~> ./krf_vm.sh 
[INFO]  Missing prerequisites: kernel headers
Looking for gpg keys in repository Update repository of openSUSE Backports.
...
(15/15) Installing: kernel-default-devel-6.4.0-150600.23.103.1.x86_64 ...................................................................................................................[done]
[INFO]  Cloning and building krf in /opt/krf...
Cloning into '/opt/krf'...
...
make: Leaving directory '/opt/krf/src/krfmesg'
[INFO]  Loading krfx.ko (force; built against non-running kernel headers)...
[INFO]  Configuring krf (syscalls='write', prob=1)...
[INFO]  Running 'dd if=/dev/urandom of=/dev/null bs=64K count=512' through krfexec...
exit_code=1
[ 1165.744074] faulting write with EINVAL
[ 1165.746524] faulting write with EINTR
[ 1165.746852] faulting write with EBADF
[ 1165.747516] faulting write with EINTR
[ 1165.747841] faulting write with EINVAL
[ 1165.748560] faulting write with EFAULT
[ 1165.750641] faulting write with EBADF
[ 1165.750905] faulting write with EFBIG
[INFO]  Done!
suser@localhost:~> dd if=/dev/urandom of=/dev/null bs=64K count=512 && echo $?
512+0 records in
512+0 records out
33554432 bytes (34 MB, 32 MiB) copied, 0.334095 s, 100 MB/s
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