-added auth for rolechange, endpoint and test

backend/internal/types/project.go

@@ -13,3 +13,9 @@ type NewProject struct {
 	Name        string `json:"name"`
 	Description string `json:"description"`
 }
+
+type RoleChange struct {
+	Role        string `json:"role" tstype:"'project_manager' | 'user'"`
+	Username    string `json:"username"`
+	Projectname string `json:"projectname"`
+}