[ENH] Use a neutral format to have lossless interface with JSON, Xarray, Astropy, pandas

[loco-philippe]

What is the problem this feature will solve?

Each tool has a specific structure for processing multidimensional data with the following consequences:

• interfaces dedicated to each tool,
• partially processed data,
• no unified representation of data structures

Describe the desired outcome

The proposed format (see jupyter notebook, github repository, PyPI package ) is based on the following principles:

• neutral format available for tabular or multidimensional tools (e.g. Numpy, pandas, xarray, scipp, astropy),
• taking into account a wide variety of data types as defined in NTV format,
• high interoperability: reversible (lossless round-trip) interface with tabular or multidimensional tools,
• reversible and compact JSON format,
• Ease of sharing and exchanging multidimensional and tabular data,

Additional context

numpy/numpy#12481 (comment)
astropy/astropy#16286