Update MarkEdit Textpack Export to v0.2.0

[haohailong]

Summary

Updates the existing markedit-textpack registry entry to v0.2.0 while retaining v0.1.0. The new version points to the published GitHub Release and pins the verified release asset SHA-256 (72cde797c4ee71870569a143335dd57be7aa3c75800a67d68c8b9bf0460b8635). The minimum MarkEdit version remains 1.36.0.

This release addresses all three edge cases raised in the initial review:

• Escape asset filenames safely when rewriting Markdown links and quoted HTML attributes, including parentheses and apostrophes.
• Match actual HTML src / href attributes rather than data-src / data-href.
• Preserve query strings and fragments such as guide.md#introduction on rewritten local links.

It also adds complete Traditional Chinese extension messages alongside English and Simplified Chinese, plus regression coverage for the built script.

Verification

• Extension: npm test — 12/12 passed.
• Manual MarkEdit exports in English and Traditional Chinese: both produced valid Textpack archives with the expected three bundled local assets, one unchanged unreadable link, and one unchanged external link. The bundled screenshot images matched the source bytes.
• Registry: npm test — 14/14 passed; npm run build completed with full download and SHA-256 checks (31 extensions, 11 themes).
• The published v0.2.0 JavaScript asset was downloaded and its SHA-256 matched the entry above.

Generated index.json and site files are intentionally excluded; this PR changes only extensions/markedit-textpack.json.

Thank you, @cyanzhong, for the careful review and specific suggestions that led to these fixes.

[cyanzhong]

Thanks!