kodev(feat): add cov command
kodev(feat): add cov command

mwoz123/koreader,mihailim/koreader,koreader/koreader,Hzj-jie/koreader,poire-z/koreader,houqp/koreader,lgeek/koreader,NiLuJe/koreader,Markismus/koreader,Frenzie/koreader,NiLuJe/koreader,pazos/koreader,robert00s/koreader,koreader/koreader,apletnev/koreader,Frenzie/koreader,poire-z/koreader