[Plan] Rework the library

[Lazialize]

Now, this library is not useful.
For example, it is too hard to instance a new object on code and rewrite, add and delete values.

I think the TyD is for read-only in code, but someone will want to edit well.

[Lazialize]

Plan A: Add to_dict and from_dict methods to TyDNode.
It is simple, so implementation easy. But, there is a risk for losing information that abstract, inheritance, etc.
I think this is not the right solution.

Plan B: Change spec to edit easily like dict object.
I think this solution is right. But, TyDCollection has information of the child nodes as a list object currently.
Therefore, I will have to redesign any object.

[Lazialize]

It might that Plan B is not hard.

I was mistaken because of my lack of knowledge of the python.

[Lazialize]

I found a new issue.
Currently, TydNode includes a line on the document as an instance member.
I cannot understand my past thinking.

[Lazialize]

I think it doesn't need editing the more I understand TyD...