Project Templates for Netlify

What does this MR do?

Adds equivalent project templates that we have for Pages, but modified as lightly as possible to work with Netlify.

• add Netlify svg
• make sure these work with zero additional Netlify configuration needed
  • hugo (https://gitlab.com/pages/nfhugo)
  • jekyll (https://gitlab.com/pages/nfjekyll)
  • plain html (https://gitlab.com/pages/nfplain-html)
  • gitbook (https://gitlab.com/pages/nfgitbook)
  • hexo (https://gitlab.com/pages/nfhexo)

What are the relevant issue numbers?

Closes #57785 (closed)

Does this MR meet the acceptance criteria?

• Changelog entry added, if necessary
• Documentation created/updated via this MR
• Documentation reviewed by technical writer or follow-up review issue created
• Tests added for this feature/bug
• Tested in all supported browsers
• Conforms to the code review guidelines
• Conforms to the merge request performance guidelines
• Conforms to the style guides
• Conforms to the database guides
• Link to e2e tests MR added if this MR has Requires e2e tests label. See the Test Planning Process.
• Security reports checked/validated by reviewer