Add options to generate docs with sidebar, navbar and coverpage

[WesleyGoncalves]

When I create documentations with docsify, I like to include the coverpage, sidebar and navbar features to take advantage of these amazing resources. So, I decided to automate this process creating options to the init command to include these templates.

So, you can include coverpage, for example, using this command

docsify init ./ --coverpage

# or short
docsify init ./ -c

docsify init <path> [--local false] [--theme vue] [--sidebar false] [--navbar false] [--coverpage false]
docsify init <path> [-l false] [-t vue] [-s false] [-n false] [-c false]

CHANGES

• lib/cli.js
• lib/commands/init.js
• Docs:
  • docs/README.md
  • tools/locale/en.json
• Add templates _coverpage.md, _sidebar.md, and _navbar.md files to lib/template

I hope that helps docsify users.

[sy-records]

LGTM. Thank you for your contribution.

[jamesgeorge007]

I think it is better to prompt the user to choose between the templates he/she intends to have.

[sy-records]

What template? _sidebar.md these?