Add base Github wiki

[rosle]

#286

What happened

• Github now is an optional addon
• Init base Github wiki if user select to install Github addon
• Revamp the message to output the instruction message after complete

Insight

Keep the README.md in the base template. When Github addon is selected:

• Split the current content in the README.md to multiple wiki pages
• Move .github/workflow/README.md -> .github/wiki/CI-CD.md
• After completed, show manual instruction, so the user can complete the setup

Revamp template message

Now that we add the manual instruction, I took the opportunity to refactor the whole message when the project creation is completed.

1. Output the rubocop autofix to tmp/template_rubocop.txt
2. Print success message
3. Print the error and instruction if it is set

With multiple errors + instructions:

Proof Of Work

You can try on your local with:

rails new <app_name> -m https://raw.githubusercontent.com/nimblehq/rails-templates/feature/github-wiki/template.rb

Enable Github Addon, it should generate wiki pages

## Table of Contents

- [[Home]]
- [[Getting Started]]

## Infrastructure

- [[CI/CD|CI CD]]

## Operations

- [[Testing]]

Please review the content in the PR

[olivierobert]

I am not sure about this architecture implementation as it feels a bit unnatural/strange 🤔

Just like flashes, how about instead having one class/object e.g. Template::Messages and when adding a new message to the list, one has to add a type e.g. {type: :info, text: "Please set up ..."}, {type: :error, text: "Please set up ..."}. Then when looping for messages, the messages will be filtered by type.

Note that there could be some convenience methods like Template::Messages.add_info, Template::Messages.add_error. These could be created automatically for each type using define_method:

class Template::Messages
  #...

  def add(type message)
    messages << { type: type: message:  message.chomp }
  end

  ["error", "info"].each do |type| 
	 define_method(:"add_#{type}") do |message|
        add(type, message)
      end
   end
end

[rosle]

Let me rework the message system in another PR. I need to revisit all the places that we add the message and also deal with how to print out all messages of specific type 🙏

[rosle]

I'll be working on it when doing Issue: Refactor Template Helpers