Support array properties in Duktape backend

It should be possible to create a `Property>("myArray", ...)` and access its elements from JS as `myObj.myArray[x]`.

Currently, I see two issues that must be addressed:
- [ ] the typed-library does not recognize `std::vector` as an array type, only `std::array`
- [ ] the Duktape backend does not expose arrays as such

追踪 typed-library 如何识别 std::array，以及 Duktape 后端如何公开数组属性，从 Property>("myArray", ...) 开始。当 std::vector 被识别为数组类型，并且 myObj.myArray[x] 可以从 JavaScript 使用时，即视为完成。

由索引模型根据 Issue 内容生成。