add scene save and load in quasar backend

backend/models/value.go

@@ -0,0 +1,9 @@
+package models
+
+import "github.com/google/uuid"
+
+type Value struct {
+	Uuid  uuid.UUID `json:"uuid"`
+	Path  string    `json:"path"`
+	Value any       `json:"value"`
+}