v1.0.2 — Improve Preview spacing and quote borders

Preview now follows Mixed mode more closely, with matching spacing for headings, lists, tables, and callouts.

• Fix quote borders in Preview. Quotes now have a clean, straight left border.
• Refresh the README with English examples and clearer setup steps.
• Keep local test images and generated release metadata out of Git.

Validation: type checks, build, and browser tests passed. The quote fix and basic mode switching were also checked in MarkEdit on macOS.

Download markedit-theme-red-graphite.js below to install the theme. This release supports light mode only.