What is the ruling on lying in jest when it does not infringe upon a right, and the other party knows that the words are not intended literally? And is it a major or minor sin, assuming it is prohibited? And do the examples mentioned fall under the general meaning of the Prophet’s (peace be upon him) saying: "Woe to him who speaks and lies to make people laugh; woe to him, woe to him"?

The default ruling for lying is prohibition, whether it is in jest or otherwise. Your praise for the beauty of your relatives is not a lie, because all of Allah's creation is beautiful. Informing your uncle that you are looking for a bride for him is a lie that must be abandoned. Informing your friend that people are saying they have a lot of money is a lie, unless it is a commonly understood idiom in your country. Your statement to someone you meet, "You consider him a man," must be abandoned because it is an aspersion on his masculinity.