frontend spotify login component and de-duplication

[ibixler]

this pr adds support for:

• users deleting themselves and all their data
• users re-linking and unlinking spotify
• adds small settings menu

Also, this pr puts song and album data in a global lib folder at the base of the repo

[ibixler]

there are new env rules see slack

[notsoli]

wow this fixes like a billion issues lol

[ibixler]

lul thanks for adding the fixes things things iykyk

am i good to go ahead and merge this?

[notsoli]

yeah for sure, gl with the conflicts teehee