Add code gallery with examples to documentation

The documentation should have a section with real-life code examples. The code should live somewhere in the documentation, it should not be imported into the namespace.

• The generated Sphinx documentation includes code examples from some location.
• There is at least one example, which also has a test.
• Minimal testing solution: There is a Makefile which runs all tests.

changed due date to January 10, 2022

added EnhancementAccepted label

assigned to @daniel

changed the description

added Statusnext label

changed iteration to Sprint Dec 13, 2021 - Dec 24, 2021

added Statustodo label and removed Statusnext label

changed the description

added (E label

set weight to 16

added Statusnext label and removed Statustodo label

added Statustodo label and removed Statusnext label

added Statusdoing label and removed Statustodo label

added Statustodo label and removed Statusdoing label

removed due date

added P3 label

removed iteration Sprint Dec 13, 2021 - Dec 24, 2021

added Statusdoing label and removed Statustodo label

changed iteration to Sprint Jan 10, 2022 - Jan 21, 2022

marked the checklist item The generated Sphinx documentation includes code examples from some location. as completed

marked the checklist item There is at least one example, which also has a test. as completed

marked the checklist item Minimal testing solution: There is a Makefile which runs all tests. as completed

added StatusReview label and removed Statusdoing label

assigned to @florian and unassigned @daniel

mentioned in merge request !41 (merged)

assigned to @daniel and unassigned @florian

closed

removed StatusReview label

mentioned in commit cb83b96f