Separate Demo Site from Documentation Site

[lattln]

Description

Currently, the documentation site (apps/mieweb-forms-docs) includes embedded demo pages (/editor-demo, /renderer-demo) that load the full @mieweb/forms-editor and @mieweb/forms-renderer packages.

This increases documentation page load time and couples demo deployments with documentation updates.

We should host apps/web-demo-packages as a standalone demo site and link to it from the documentation site instead of embedding demos directly.

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Benefits

• Faster documentation site load times (no heavy demo bundles)
• Independent deployment cycles for docs and demo
• Improved demo UX (full-screen layout, example selector, JSON import, multi-instance playground)
• Simplified docs build process and bundle output

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Scope / Tasks

• Deploy apps/web-demo-packages as a standalone demo site
  (GitHub Pages or equivalent hosting)

• Update docusaurus.config.js navbar to use external links (href)
  instead of internal routes for demo access

• Remove embedded demo routes:

  • /editor-demo
  • /renderer-demo

• Delete embedded demo components:

  • src/components/EditorDemo/
  • src/components/RendererDemo/

• Update all internal documentation links pointing to:

  • /editor-demo
  • /renderer-demo
    to reference the external demo site

• Verify documentation site bundle size is reduced after removal

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Acceptance Criteria

• Documentation site no longer bundles demo code
• Demo site is independently accessible via a public URL
• Docs navbar links open the demo site externally
• No broken links remain in documentation
• Documentation site build output is smaller than before

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Notes

• Demo URL to be finalized (e.g. https://demo.questionnaire-builder.opensource.mieweb.org)
• Dark mode and advanced playground features for the demo site can be handled in follow-up tickets