[Feature]CLI specification

[Souvikns]

As for now, the functionalities are

• build
• create
• dev

build command

diplodoc will be converting .md files to .html also adding styles and static content and spit all these files into a build folder

create command

This command will generate a diplodoc project structure template.
basic template

- pages
    - index.md
- static
    - images
        - logo.png
- diplodoc.config.js

dev command

This command will just create a dev server and run on port localhost:3000 for development purpose.

[Souvikns]

diplodoc <action/verb> <resource>

options: 
-V, --version   output the version number
-h, --help        display help for command

commands:
create [options]    create project
build   [options]    create build 
dev     [options]    run development server