Add docusaurus-plugin-copy-page-button

[portdeveloper]

Summary

Adds docusaurus-plugin-copy-page-button to docs.temporal.io so readers can copy any page as clean markdown — useful when piping workflow/activity API or troubleshooting context into ChatGPT, Claude, Perplexity, or Gemini.

The plugin auto-injects a small "Copy page" button + dropdown into the doc page's table-of-contents area. The dropdown offers:

• Copy as markdown
• View as markdown
• Open in ChatGPT / Claude / Perplexity / Gemini

Live preview of the UI: https://portdeveloper.github.io/copy-page-button-showcase/

Relationship to existing LLM features

Temporal docs already does great work on machine-readable content:

• docusaurus-plugin-llms generates /llms.txt, /llms-full.txt, and the custom llms-quickstart.txt / llms-api-reference.txt corpus files.
• The custom plugins/markdown-pages plugin makes every page available at <path>.md.

This PR doesn't replace or duplicate any of that — those remain perfect for whole-corpus consumption and agent fetching. The plugin adds the UI affordance: a reader on a specific page can grab just that page's markdown, or one-click open it in ChatGPT/Claude/Perplexity/Gemini for a focused conversation. Build output confirms all existing corpus files still generate.

Adoption

The plugin currently ships on docs sites for React Native (just merged via facebook/react-native-website#5085), Puppeteer, Arbitrum, Cardano, Sui, Ethereum execution-apis, and several others — full list in the project README.

Changes

• Added 'docusaurus-plugin-copy-page-button' to the plugins array in docusaurus.config.js
• Added docusaurus-plugin-copy-page-button@^0.6.2 to dependencies
• Resulting yarn.lock updates

yarn build passes — existing llms.txt, llms-full.txt, custom corpus files, and markdown-pages output all still generate.

┆Attachments: EDU-6425 Add docusaurus-plugin-copy-page-button

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