[Feedback]: Markdown Preview with Mermaid Diagram support

What problem are you trying to solve?

I often create some markdown files in my project, sometimes these are docs, sometimes content collection, sometimes blog posts, sometimes design skill artifacts, etc ...

The file preview panel lets me view the .md file, but not in a rendered preview way.

What would improve it?

• render markdown previews richly
• support Mermaid diagrams
• allow for wider view (currently, seems restricted width so hard to review complete file).
• ^^ in fact my prompt chat panel area is the one I need to be the narrowest as that is a prompt and responsive. the File list and preview or browser are the areas I likely need to be wider

What do you do today?

If I check in to GitHub, I view there as it provides the preview rendering I need - or I use a VSCode extension to review.

Ideally, th file preview could support other text formats too: md, css, yaml, toml.

Product area

Other

この issue ではファイルプレビューパネルが挙げられていますが、ファイル、テスト、実装のエントリーポイントは示されていません。まずそのパネルを特定し、要求されているプレビューのレンダリング、Mermaid のサポート、より広いレイアウト、追加のテキスト形式を整理してください。選択した形式で動作するプレビューが実装され、スコープについて合意できれば完了です。