[all hosts] (DevX) Refresh JS to TS in VS article

[AlexJerabek]

This article was flagged as low engagement. This PR gives it a quick refresh.

[learn-build-service-prod]

PoliCheck Scan Report

The following report lists PoliCheck issues in PR files. Before you merge the PR, you must fix all severity-1 and severity-2 issues. The AI Review Details column lists suggestions for either removing or replacing the terms. If you find a false positive result, mention it in a PR comment and include this text: #policheck-false-positive. This feedback helps reduce false positives in future scans.

✅ No issues found

More information about PoliCheck

Information: PoliCheck | Severity Guidance | Term
For any questions: Try searching the learn.microsoft.com contributor guides or post your question in the Learn support channel.

[learn-build-service-prod]

Learn Build status updates of commit ecf7dd1:

✅ Validation status: passed

File	Status	Preview URL	Details
docs/develop/convert-javascript-to-typescript.md	✅Succeeded	View

For more details, please refer to the build report.

[Copilot]

Pull request overview

Refreshes the “Convert JavaScript to TypeScript in Visual Studio” article to improve clarity, modernize wording, and update related links for Office Add-in developers.

Changes:

• Updated the article title/description and added an overview “What you'll do” section.
• Refreshed wording throughout the steps for consistency (for example, NuGet/npm phrasing and TypeScript code fence labeling).
• Replaced the previous “See also” link with updated, relevant internal documentation links.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.