add doc

.gitignore

.gitlab-ci.yml

doc/Makefile

doc/source/_static/.gitignore

doc/source/_templates/autosummary/attribute.rst

doc/source/_templates/autosummary/class.rst

doc/source/_templates/autosummary/method.rst

doc/source/_templates/autosummary/property.rst

doc/source/_templates/indexsidebar.html

doc/source/_templates/layout.html

doc/source/_templates/searchbox.html

doc/source/_theme/scipy/layout.html

doc/source/_theme/scipy/searchbox.html

doc/source/_theme/scipy/sourcelink.html

doc/source/_theme/scipy/static/css/extend.css

doc/source/_theme/scipy/static/css/pygments.css

doc/source/_theme/scipy/static/css/scipy-central.css

doc/source/_theme/scipy/static/css/spc-bootstrap.css

doc/source/_theme/scipy/static/css/spc-extend.css

...ce/_theme/scipy/static/img/glyphicons-halflings-white.png