Add “Copy as .md” button on docs pages (LLM-friendly export)

[sh1ftred]

Context

In the docs UX, add a way for clients (and LLM workflows) to easily extract the documentation as Markdown.

Quote from chat: “We should add copy as .md button.”

Proposal

Add a “Copy as .md” button to doc pages that copies the current page’s content as clean Markdown to the clipboard.

Acceptance criteria

• Button is visible on doc pages (placement TBD, e.g. top-right near page actions)
• Copies Markdown (not HTML) to clipboard
• Markdown output is clean and readable for LLM ingestion:
  • Preserves headings, code blocks, lists, tables (if applicable)
  • Removes navigation/sidebar/chrome
  • Uses canonical links where needed
• Works on desktop browsers (Chrome/Firefox/Safari)
• Shows success/error feedback (toast or inline)

Implementation notes (optional)

• Use the existing MD source if the site is MD/MDX-based; otherwise convert the rendered content to MD.
• Consider adding a small “Copy failed—download .md” fallback.