Allow import/export from JSON

[tversteeg]

The current format is not serializable, so it can't be non-trivially sent over a network connection. We need to add Cpt.from_json() and Cpt.to_json() methods (same for Borehole).

[ritchie46]

Format of what? The gef files, or the state we keep internally when we parsed it?

[tversteeg]

Format of what? The gef files, or the state we keep internally when we parsed it?

The whole Cpt and Borehole classes. So basically the parsed state.

[ritchie46]

Right, there is room for optimization here. I think we should consider a naive to_json, but also a serialize / deserialize. (with some options, e.g. `parquet, ipc, compression types).

For instance the columnar format of the DataFrame can be stored in binary and be compressed. Which can save quite some wire transfer.

[breinbaas]

Why not use pydantic's BaseModel which makes it easy with json() and parse_raw()

[maarten-betman]

Hi @tversteeg, this feature would be useful for some services I'm running. Ok if I put a PR in for this enhancement?
How do you feel about usage of Pydantic?

[tversteeg]

Any PRs are greatly appreciated! Pydantic looks like a nice solution for this problem.