Add Hello World Programs in different languages

[AkshatArora]

[arfu786]

Let me

[amowel]

@AkshatArora As there are a lot of contributors, maybe it's time to add some general template for hello worlds sections, move sources from root to source folder and optionally provide a section with a description of the execution process.

[adalbertobrant]

Hi @AkshatArora I did an ArnoldC Hello World for you my friend , I hope it is ok.