proper url parsing

[MangoIV]

this was requested by @hasufell and should probably be implemented for good measure

[hasufell]

• https://hackage.haskell.org/package/uri-bytestring-0.3.3.1/docs/URI-ByteString.html
• https://github.com/haskell/ghcup-hs/blob/master/lib/GHCup/Utils/URI.hs