feat: add --interval flag

lib/app.go

@@ -5,12 +5,14 @@ type App struct {
 	SelectedTidalApiUrl string
 	Verbose             bool
 	SpotifyClient       *SpotifyClient
+	ApiInterval           int // How many ms to wait between one call to apis and the other
 }
 
 func NewApp() App {
 	return App{
 		UserAgent: "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/144.0.0.0 Safari/537.36",
 		Verbose:   false,
+		ApiInterval: 800,
 	}
 }