MarkdownPreviewEnhanced 0.2.4
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- feat: GitHub-style callouts (`> [!NOTE]` / `TIP` / `IMPORTANT` / `WARNING` / `CAUTION`)
- feat: GFM inline syntax: strikethrough `~~text~~`, highlight `==text==`, superscript `^text^`, subscript `~text~`
- feat: click a preview image to enlarge it (drag to pan, scroll wheel to zoom, Esc to close)
- feat: GFM task-list checkboxes are clickable and write `- [ ]` / `- [x]` back to the file
- fix: code-block Copy button no longer includes the button label in the copied text
