Merge branch 'release-3.0.0'

CHANGELOG

CMakeLists.txt

NOTICE

actions/doc/index.rst

actions/pm-build-model

actions/pm-build-rawmodel

actions/pm-build-sidechains

actions/pm-help

actions/tests/test_action_build-model.py

actions/tests/test_action_build-rawmodel.py

actions/tests/test_action_help.py

actions/tests/test_actions.py

cmake_support/FindPython.cmake

cmake_support/FindSphinx.cmake

cmake_support/PROMOD3.cmake

config/src/config.hh.in

container/Dockerfile

container/Singularity

core/doc/geometry.rst

core/doc/graph_minimizer.rst