Closes#1737
* wrapping playlist comment in a <Collapse> element
* Extract common collapsible logic into a component
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Co-authored-by: Deluan <deluan@navidrome.org>
* Re-add tpbnick's Nord theme
* Run Prettier formatter on Nord theme
* Update themes index
* Fix button margins
* Modernise the look of switches
* Adjust margins and padding
* Fix sidebar's background colour not applying to all of sidebar when scrolling down
* Adjust App Bar box shadow
* Adjust roundedness
* Adjust shadows
* Adjust outlined inputs
* Add transitions to items in sidebar when hovered / losing hover
* Adjust border radiuses
* Adjust pagination buttons
* Add big play button from Spotify theme
* Remove playlist background gradient
* Adjust colour of MuiChip elelments
* Adjust table borders
* Remove duplicate MuiTableRow key
* Attempt to make switches in both the playlist section and settings section visable against background & the toggle. Not ideal.
* Style the player
* Format CSS to Prettier standards
* Fix mobile player style
* Make play button in album grid view blue
* Make main view background lighter
