keyword feature

[judyha777]

Add a keyword function that helps music playlists be more discoverable and optimize music recommendations! Currently if I wanted to search for a certain mood playlist, I would type in keywords but only the playlists where the title matches the search will pop up. This leaves so many underrated playlists in the dark. Similar to 8tracks, they use keywords to describe a playlist and can be found if users types in that keyword.