feat: begin connecting soundcloud

[tcjcodes]

feat:

• began soundcloud integration: URL works with react-soundcloud-player
• plays & pauses track on button click
• next & previous track auto-plays on button click
• started state management for music player w/ MusicContext
• current track title updates when clicking track from list

style:

• expandable section w/ track list
• seeker styling
• improve contrast: changed white value
• improve calls to theme object vs hardcoding

chore:

• remove react-bulma-components

WIP / FIXME:

• play current track (currently just goes back to first track)
• keep seeker in track with song progress (duration?)
• lots of console statements for debugging
• mock song data doesn't work yet, maybe because no URL?
• horizontal scrollbar shows in tracklist
• needs loading indicator
• expandable more/less button shows after player is ready