Implement forkbombs in various languages

[iamtraction]

Write forkbombs in the languages that aren't yet available. You can look at the existing code for inspiration.
Make sure to create separate PRs for every language.

[hamzzy]

i would love to work on this .

[Sven65]

I've added forkbombs for Powershell, R, VBS and AWK.