Merge branch '16-repo-documentation' into 'dev'

.gitignore

.gitlab-ci.yml

README.md

pages/.gitattributes

pages/.gitignore

pages/Makefile

pages/_static/moving-robot.mp4

pages/conf.py

pages/custom_theme/footer.html

pages/docs/adding.md

pages/docs/extending.md

pages/docs/img/moving-robot.mp4

pages/docs/img/mpm4cps-slides.pdf

pages/docs/img/poster-presentation.mp4

pages/docs/img/poster.pdf

pages/docs/img/robo3d.png

pages/docs/img/ros2rag-process.png

pages/docs/index.md

pages/docs/inner-workings.md

pages/docs/use_cases.md