* merge highlight.scss * show line number when scroll
closes https://github.com/CaiJimmy/hugo-theme-stack/issues/126
* feat(darkmode): initial support for dark mode toggle * fix(darkmode): add svg icons * feat(darkmode): dispatch onColorSchemeChange event * add head/darkmode * feat(darkmode); add colorScheme config * style: remove empty line * refactor(darkmode): simplify code * style: add comment for darkmode config * i18n support for dark mode toggle * Some renaming