ICO 转 WebP
把 ICO 图标转成体积小巧的 WebP 并保留透明效果，方便在网页里再次使用这些图标。
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ICO
The format for favicons and app icons. Not meant for regular photos or graphics.
WebP
A modern format that keeps photos and graphics looking sharp at a smaller file size. Popular for fast-loading websites.