Add detailed docs on how to use Verilog in CV

[092vk]

In Docs add a new section for Verilog .
This will include all the verilog related feature which cv has currently explaining them and user guide on how to use them , with warning about its inconsistencies.

Are you working on this? (Yes/No)

Yes

[092vk]

@tachyons Kindly assign me this issue.