Add Native Sharing REST API (#1150)

* Initial draft - UNTESTED

* changes to Save() and Update()

* apply col filter and limit nanoid

* remove columns to not update

main.go

@@ -1,12 +1,15 @@
 package main
 
 import (
+	"math/rand"
 	"runtime"
+	"time"
 
 	"github.com/navidrome/navidrome/cmd"
 )
 
 func main() {
+	rand.Seed(time.Now().UTC().UnixNano())
 	runtime.MemProfileRate = 0
 	cmd.Execute()
 }