Now there is an extension called Colonize:
Shift+Enter Insert semicolon at the end of line and continue on the same line
Alt+Enter Insert semicolon at the end of line and continue on the new line
Ctrl+Alt+Enter Insert semicolon and stay at the same position
与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…