add: Prepare JCGS code submission (rev1)

.docstr.yaml

.gitignore

.pre-commit-config.yaml

CITATION.cff

LICENSE

README.md

docs/Makefile

docs/coverage.svg

docs/docstr_coverage_badge.svg

docs/make.bat

docs/source/_templates/custom-class-template.rst

docs/source/_templates/custom-module-template.rst

docs/source/biblio.bib

docs/source/biblio.rst

docs/source/conf.py

docs/source/index.rst

docs/source/setup.rst

docs/source/strings_all_ref.bib

examples/jcgs/configs/house1022_M30_ks11.json

examples/jcgs/configs/house512_M30_ks7.json