Add GitLab CI/CD setup guidance

[naokihaba]

Documentation is

• Missing
• Outdated
• Confusing
• Not sure

Explain in Detail

setup-vp now supports GitLab CI/CD through a reusable remote template, following voidzero-dev/setup-vp#97.

However, the current Continuous Integration guide only covers GitHub Actions. This makes the GitLab integration less visible within the Vite+ documentation.

I plan to submit a PR to add GitLab CI/CD guidance to this page.

Your Suggestion for Changes

Update the overview to mention both GitHub Actions and GitLab CI/CD, and add a dedicated GitLab CI/CD section with a minimal example:

include:
  - remote: "https://raw.githubusercontent.com/voidzero-dev/setup-vp/v1/gitlab/setup-vp.yml"

test:
  extends: .setup-vp
  image: node:24
  script:
    - vp check
    - vp test
    - vp build

The section should also clarify the main differences from the GitHub Actions integration:

• The GitLab template does not install Node.js, so the job must use a Node.js image or otherwise provide it.
• Dependency caching must be configured through the job's GitLab cache: configuration.
• The runner requires a Unix-like environment with bash and either curl or wget.
• Advanced configuration and the complete input reference should remain in the setup-vp documentation to avoid duplicating information that may drift over time.

Relevant Page

https://viteplus.dev/guide/ci#overview

Reproduction (Optional)

No response

Steps to reproduce (Optional)

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