Initial test for neu run command

[pathange-s]

@shalithasuranga Need discussion on how to test commands that open neutralinojs app. The further tests gets halted in case a command runs to open a neutralinojs app. We can however use OS specific commands to get the app closed to check for expected output. This implementation will however require different tests for different operating systems.

I have checked out tests that run on the main framework. Its very clear that these tests become redundant here. So I don't find a point in adding tests here. However I created a file for neu run tests to keep things consistent and in case new tests need to be added later. Please let me know in this regard.