refactor: move shared packages up a level

scrobble/scrobble.go

@@ -0,0 +1,11 @@
+package scrobble
+
+import (
+	"time"
+
+	"go.senan.xyz/gonic/db"
+)
+
+type Scrobbler interface {
+	Scrobble(user *db.User, track *db.Track, stamp time.Time, submission bool) error
+}