Proposal: add a bilingual README hero for lark-cli

Hi maintainers,

I like lark-cli and wanted to try contributing a small improvement to its README.

I made a lightweight bilingual SVG hero for the English and Chinese READMEs. It follows the existing Lark/Feishu colors, keeps the install command visible, and is designed to render cleanly on GitHub at both desktop and narrow widths.

Before opening a PR, I wanted to ask whether this direction would be useful for the project.

English preview

Chinese preview

If the direction is welcome, I can prepare a focused docs PR that:

• adds separate English and Chinese SVG files;
• keeps both READMEs synchronized;
• uses the asset location and official logo source you prefer;
• removes or simplifies the numeric statistics if you would rather avoid maintaining values inside an image.

Thank you for taking a look.

Review the English and Chinese READMEs first, then confirm the preferred asset location and official logo source with maintainers. Done means adding the agreed English and Chinese SVG heroes, keeping both READMEs synchronized, and following the decision on whether to retain numeric statistics.