Fix the "Edit this page on GitHub" link in Vitepress documentation for the Mermaid Config pages

[aloisklink]

📑 Summary

Fix the "Edit this page on GitHub" link for the Mermaid Config Schema http://localhost:3333/config/schema-docs/config.html.

Before (edit link points to file that doesn't exist)

Edit Link points to packages/mermaid/src/docs/config/schema-docs/config.md, which doesn't exist: https://github.com/mermaid-js/mermaid/edit/develop/packages/mermaid/src/docs/config/schema-docs/config.md

After (edit link points to correct file)

Edit Link correctly points to packages/mermaid/src/schemas/config.schema.yaml: https://github.com/mermaid-js/mermaid/edit/develop/packages/mermaid/src/schemas/config.schema.yaml

📏 Design Decisions

Vitepress 1.0.0-beta.53 allowed the editLink parameter in the Vitepress config to accept a function, instead of just a pattern. I've changed this Vitepress config function to then accept a custom edit link in the YAML frontmatter of Markdown files, which is created by transformMarkdownAst.

So essentially:

• transformMarkdownAst({originalFilename, addEditLink: true}) now adds the following YAML frontmatter to a markdown file:

  ---
  editLink: "https://github.com/mermaid-js/mermaid/edit/develop/packages/mermaid/src/schemas/config.schema.yaml"
  ---
  
  Here is my markdown file!

• Our custom .vitepress/config.ts editLink.pattern function will then use the frontmatter.editLink as the edit link, if it exists.

📋 Tasks

Make sure you

• 📖 have read the contribution guidelines
• 💻 have added unit/e2e tests (if appropriate)
• 📓 have added documentation (if appropriate)
• 🔖 targeted develop branch

[codecov]

Codecov Report

Merging #4640 (4d2d790) into develop (946b5f1) will increase coverage by 31.72%.
The diff coverage is n/a.

Additional details and impacted files

@@             Coverage Diff              @@
##           develop    #4640       +/-   ##
============================================
+ Coverage    45.28%   77.01%   +31.72%     
============================================
  Files           52      143       +91     
  Lines         6633    14476     +7843     
  Branches        18      516      +498     
============================================
+ Hits          3004    11149     +8145     
+ Misses        3629     3222      -407     
- Partials         0      105      +105     

Flag	Coverage Δ
e2e	83.97% <ø> (?)
unit	45.32% <ø> (+0.03%)	⬆️

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see 137 files with indirect coverage changes