Clarify support content types for exports

[maximiliankolb]

What changes are you introducing?

You can export all supported content types in "importable" format which is the default. You cannot export Ansible, Deb, or Docker content in "syncable" format.

• Add snippet for supported content to export content
• Add snippet for supported content to export content in syncable format
• Hide Deb content for Satellite
• List content types in alphabetical order
• Support exporting Deb content

Why are you introducing these changes? (Explanation, links to references, issues, etc.)

It was not clear that Foreman+Katello supports exporting/importing Deb content but not Deb content in syncable format.

Anything else to add? (Considerations, potential downsides, alternative solutions you have explored, etc.)

alternative implementation idea: add a small concept file that lists supported content types for export in importable format and exports in syncable formats. That would have the benefit of us not including the snippets a dozen times. Downside: users would have to read more than just the procedure.

Checklists

• [x] I am okay with my commits getting squashed when you merge this PR.
• [x] I am familiar with the contributing guidelines.

Please cherry-pick my commits into:

• [x] Foreman 3.13/Katello 4.15 (Satellite 6.17)
• [ ] Foreman 3.12/Katello 4.14 (Satellite 6.16)
• [ ] Foreman 3.11/Katello 4.13 (orcharhino 6.11 on EL8 only)
• [ ] Foreman 3.10/Katello 4.12
• [ ] Foreman 3.9/Katello 4.11 (Satellite 6.15; orcharhino 6.8/6.9/6.10)
• [ ] Foreman 3.8/Katello 4.10
• [ ] Foreman 3.7/Katello 4.9 (Satellite 6.14)
• [ ] Foreman 3.6/Katello 4.8
• [ ] Foreman 3.5/Katello 4.7 (Satellite 6.13; orcharhino 6.6/6.7)
• We do not accept PRs for Foreman older than 3.5.

[github-actions[bot]]

The PR preview for b3f9d0f13703c4d75aeb266112fe3903d89a568a is available at theforeman-foreman-documentation-preview-pr-3466.surge.sh

The following output files are affected by this PR:

• Managing_Content/index-katello.html
• Managing_Content/index-orcharhino.html
• Managing_Content/index-satellite.html

show diff

show diff as HTML

[maximiliankolb]

I made some comments on further improvements. Please react with +1 or -1 if you'd like me to apply those.