docs(user-guide): document table copy-to-clipboard button

[Shagon1k]

Summary

Documents the new Copy button that appears on markdown tables in assistant responses — added in EPMCDME-13243. When clicked, it copies the full table to the clipboard and shows a brief confirmation toast.

Changes

• Added docs/user-guide/assistants/copy-table.md — new standalone page explaining the table copy button, positioned after the HTML Preview page in the sidebar
• Updated sidebars.ts — registered the new page in the Assistants navigation
• Added faq/how-do-i-copy-a-table-from-an-assistant-response.md — FAQ entry for the feature

Testing

• Tested locally with npm start
• All pages render correctly
• Images display properly
• Internal links work
• Sidebar navigation works

Quality Checks

• npm run check passes (typecheck + lint + commitlint)
• No MDX compilation errors
• No raw angle brackets (<text> must be `<text>`)
• Sidebar references document IDs (not filenames)
• Images stored locally next to content (not in static/img/)
• Commit messages follow Conventional Commits
• No secrets or credentials in documentation

Additional Notes

Related UI change: EPMCDME-13243 MR

[alezander86]

It would be helpful if you could highlight where this button is located with a screenshot.

[alezander86]

https://gitbud.epam.com/epm-cdme/codemie-onboarding#documenting-your-feature

Note — Screenshot guidelines:

Show the full screen — screenshots must not be cropped; the entire browser or application window should be visible. This gives the reader full context: they can see where in the application they are, which page or section is open, and what surrounds the feature being described — not just an isolated fragment of the UI.

Blur sensitive data — before publishing, blur any information that could identify a person or expose internal infrastructure: names, surnames, email addresses, usernames, IP addresses, hostnames, internal URLs, API endpoints, tokens, or any other credentials. A free tool for this is Awesome Screenshot & Screen Recorder, which has a built-in blur feature.

Use 100% zoom — do not zoom in the browser or OS display settings when taking screenshots.

Use standard aspect ratios — capture at 4:3, 16:9, or 16:10. Avoid ultrawide formats (21:9, 43:18, etc.) as they make content harder to read in documentation.

[alezander86]

From the screenshot, I can see personal information, browser tabs, the user's profile picture, and parts of the browser window. Here's an example of how the screenshot should look after this information is hidden.