backend model interpreter

还没有人认领这个 Issue。

This will work from MetaNode or MetaNodeModel, the latter has already serialization implemented and we can re-use that for the model that will be sent to the python AST.

taken the model, iterate the map to generate mechanisms, projections and compositions in the end.
all the other steps required for the model run will be set in the end and will have to be part of the model (specific class will be required for this).

未指定文件或测试。首先比较 MetaNode 和 MetaNodeModel 的入口点，尤其是 MetaNodeModel 中现有的序列化，然后跟踪模型映射如何为 Python AST 生成机制、投影和组合。完成的标准是模型包含运行所需的剩余步骤，并且可以发送到 Python AST。

由索引模型根据 Issue 内容生成。