combine userdata and swing db into one

+ port populate to new db interface
+ add genrehashes and hash info to tracks
+ properly structure new db table files
+ move helpers to dedicated utils file
+ move settings from db to config file
+ move artists, albums, auth and favorites endpoint to new db interface
+ use folder store to index filepaths
+ paginate favorite pages
+ 56 moretiny changes 😅

.github/changelog.md

@@ -25,3 +25,8 @@ interface Genre {
 }
 ```
 
+- Pairing via QR Code has been split into 2 endpoint:
+    1. `/getpaircode`
+    2. `/pair`
+
+-