add tool index

.gitignore

README.md

...p_size_calc/static/member_group_size_calc/calculator.webp

...oup_size_calc/templates/member_group_size_calc/index.html

member_group_size_calc/urls.py

rybicka/urls.py

shared/static/shared/style.css

shared/templates/shared/base.html

shared/templates/shared/index.html

shared/urls.py

shared/views.py

static_src/base.css