Added details about matrices and TODO in readme

added infos about device matrices

Merge branch 'add_kmc_qbit' of https://huggingface.co/datasets/vincent-maillou/NEST into add_kmc_qbit

renamed datasets to match the directory structure

Device modeling matrices

renamed datasets to match the directory structure

added spyplot script

removed matrix market format

Device modeling matrices

Update README.md

initial dataset commit

initial commit