unishigure

Resolve #21 Update to V3, due to the end of support for Manifest V2 extensions. Ref: https://developer.chrome.com/docs/extensions/develop/migrate/mv2-deprecation-timeline Also, remove `background.js` as it will no longer function with the migration of...

> [!CAUTION] > Based on Manifest V3. > Please merge #31 first or modify `manifest.json`. Resolve #24 Change 'Screenshot' text → SVG icon