map leader+uu to it
summary of what it does:
first ask the user for confirmation and tell that the updater is gonna run git reset --hard in config repo and chadrc will be restored
take backup of chadrc in a lua string and locally in a file with chadrc.bak.(random numbers)
git reset on config dir and git pull
whether success or error, restore the chadrc file
if restore fails, then print backup file path
for more deep understanding, read the comments in utils.lua
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