Merge docs from branch 'dev' into 'main'

.gitlab/merge_request_templates/Default.md

CHANGELOG.md

README_SETUP.md

src/doc/conf.py

src/doc/extension/forms.rst

src/doc/extension/module.md

src/doc/extension/query_templates.rst

src/doc/index.rst

src/doc/install.md

src/doc/tutorials/References_button.png

src/doc/tutorials/query.rst