Merge pull request #99 from imqinyu/main

l10n:Update Chinese localization

Add 'zh_CN' in LINGUAS

Update rewaita.pot

Merge branch 'SwordPuffin:main' into main

Update rewaita.pot

Merge branch 'SwordPuffin:main' into main

Update gtk.css

Update gtk.css

Update gnome-shell-template.css

Update utils.py

Update utils.py

Update rewaita.pot

l10n: Add Simplified Chinese translation

Update user guide dialog UI elements