Migrate to mantine v6 (#15)

* Add letter spacing to cell text

* Set window control height in px

* Add temp unused routes

* Migrate text title font weights

* Bump mantine to v6 alpha

* Migrate modals / notifications

* Increase header bar to 65px

* Adjust play button props

* Migrate various components

* Migrate various pages and root styles

* Adjust default badge padding

* Fix sidebar spacing

* Fix list header badges

* Adjust default theme

src/renderer/features/playlists/components/playlist-detail-song-list-header.tsx

@@ -262,8 +262,8 @@ export const PlaylistDetailSongListHeader = ({
                 variant="subtle"
               >
                 <TextTitle
-                  fw="bold"
                   order={3}
+                  weight={700}
                 >
                   {detailQuery?.data?.name}
                 </TextTitle>