Add commands for CMD and Powershell

[prithaupadhyay]

Screenshot of the issue:

[aashutoshrathi]

Brief description of the issue

The project contains a file named lang_compiler.py which contains all commands that should be executed. But since the application was initially developed on Linux, to execute binary files generated by C/C++, I called ./logic instead on windows like terminals, we have to call logic since . is not anything on CMD or PS environment.
You have to check OS and accordingly execute the command and this can be easily done with changing few lines hence added this as a begineer issue.

[helios1101]

Can i work on this fix??

[aashutoshrathi]

Yeah sure @helios1101

[Sagar2366]

#83