Load quicklink on demand

[1v9]

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows our guidelines.
• Tests for the changes was maked (for bug fixes / features).
  • Muse | Mist have been tested.
  • Pisces | Gemini have been tested.
• Docs in NexT website have been added / updated (for new features).

PR Type

What kind of change does this PR introduce?

• Bugfix.
• Feature.
• Code style update (formatting, local variables).
• Refactoring (no functional changes, no api changes).
• Build related changes.
• CI related changes.
• Documentation content changes.
• Other... Please describe:

What is the current behavior?

If enable quciklink then quicklink will load globally and prefetch current page's URL, this is a waste of resources.

What is the new behavior?

Good

• Load quicklink on demand or globally.
• Current page's URL will be ignored forever.
• Choose to enable or disable delay.

Bad

Everything is under control except load on demand.
when set per_page: true:

• Home page will load quicklink forever, maybe not bad?
• Archive page can't load quicklink on demand, how to set front matter for archive page?

How to use?

In NexT _config.yml:

• on demand and enable delay

...
quicklink:
  enable: true
  per_page: true
  delay: true
...
# Add `quicklink: true` to front matter which page you want

• globally and disable delay

...
quicklink:
  enable: true
  per_page: false
  delay: false
...

Does this PR introduce a breaking change?

• Yes.
• No.

[ivan-nginx]

@1v9 add docs with usage this feature on website, please. Thank's.

[1v9]

@1v9 add docs with usage this feature on website, please. Thank's.

I will do it.