First cut at using Mediawiki API to get the index for admin help
Fine tuning things:

- Only add strings if a COM_ADMIN string exists, this ensures we only list what we want
- Add some "debug" output to the CLI
- Add basic inflecting on strings where there are pluralization differences
- Adding some missing screens to the TOC
Make the TOC array key/value pairs with the original JHELP string as key and the COM_ADMIN string as value
Merge remote-tracking branch 'joomla/staging' into helpTOC
Doc blocks, don't import legacy libraries
Properly build out getCategoryMembers method
Merge branch 'staging' into helpTOC
Merge remote-tracking branch 'joomla/staging' into helpTOC
Check if inflected var has content
Add com_postinstall help screen
Rename retrieval script
Fix code style issues in JMediawikiCategories
Merge pull request #2759 from mbabker/helpTOC

[#33082] Help screen index missing