Remove Legacy

I think it is time to remove the following 4 functions in favor of compas.Data. Especially for the compas_fab 1.0 release.

- `write_data_to_json`
- `read_data_from_json`
- `write_data_to_pickle`
- `read_data_from_pickle`

https://github.com/compas-dev/compas_fab/blob/main/src/compas_fab/utilities/file_io.py#L44-L111

Does anyone have reservations?

Start in src/compas_fab/utilities/file_io.py at the four listed functions, then search the repository for their callers and existing uses of compas.Data. Confirm the release impact and remove the legacy functions only when no required references remain; update affected tests or callers as indicated by that search.

Written by the indexing model from the issue text.