[next] support external for editlink

[RainKolwa]

Is your feature request related to a problem? Please describe.

My project is hosted on GitLab, so I configured editLink as below:

editLink: {
    repo: 'https://gitlab.com/foo/bar',
    branch: 'main',
    dir: 'docs',
    text: '在 GitLab 上编辑此页',
}

but the editlink turned out to be https://github.com/https://gitlab.com/foo/bar/docs/edit/main/docs/application/management.md

Describe the solution you'd like

I noticed before v1.0.0, we have a isExternal function to tell if use github.com or repo config directly as base url.

Describe alternatives you've considered

No response

Additional context

No response

Validations

• Follow our Code of Conduct
• Read the docs.
• Read the Contributing Guidelines.
• Check that there isn't already an issue that asks for the same feature to avoid creating a duplicate.

[brc-dd]

Except for leading https://github.com/, that URL is fine right? Or do GitLab's edit links look different?

[RainKolwa]

Yes, except for the leading the URL is fine.

[alexeyvokin]

I was also surprised that this functionality has degraded. I will be looking forward to the changes

[kiaking]

@brc-dd @kecrily This is kinda getting complicated 😅 Before we were using this info to display GitHub social link logo on Nav bar as well, so it made sense to have these small options. But now, this option is really only used for this edit link. So, how about we make config simpler?

editLink: {
  path: 'https://github.com/vuejs/vitepress/edit/next/docs/{:path}',
  text: '在 GitLab 上编辑此页',
}

The {:path} gets replaced with the file path. All other stuff like repo, branch, dir just go into the static url string. Straight forward and user may configure it freely.

What do you think?

[brc-dd]

@kiaking Seems right. In pattern we are simply replacing :repo, :branch and :path. Since repo and branch aren't being used anywhere else, there is no need for us to inject them in pattern. Users can specify them directly in pattern.

[kecrily]

If we won't be reusing these options elsewhere, then let's drop the baggage and simply get on with it.