Context
We currently have a suite of end-to-end (E2E) tests that run on every patch merge request. We'd like to add test cases for the 7 critical user journeys (CUJs).

User flow

1. Find the function creation page in the Wikifunctions landing page
2. Go to the function creation page
3. Name my function
4. Define my function inputs
   1. Add/remove input fields
   2. Define each input type
   3. Define each input label
5. Define my function output type
   1. Optionally provide multilingual options for any of these fields
6. Function name, function aliases, input labels
7. Get educational information about optional/mandatory fields
8. Publish my function
   1. Visualize function definition successfully saved
   2. IF ERROR: Visualize function saving errors in a clear way for me to correct and re-save

Hints

• code location for tests: https://gerrit.wikimedia.org/r/plugins/gitiles/mediawiki/extensions/WikiLambda/+/refs/heads/master/tests/selenium/
• information on Selenium testing on MediaWiki: https://www.mediawiki.org/wiki/Selenium