Docs: Add instructions for managing organization owners (#12760)
## Documentation: Add Instructions for Adding Owners to Organizations
This PR adds documentation about how to add owners to an organization,
addressing the missing documentation identified in the issue.
### Summary of Changes:
- [x] Review existing documentation structure and content
- [x] Add section on adding/removing owners to the
manage-read-the-docs-teams.rst guide
- [x] Update the organizations.rst file with a reference to managing
owners
- [x] Verify the documentation builds correctly
- [x] Request code review
- [x] Address review feedback: correct UI navigation steps and add
permission requirement
- [x] Fix button label to "Invite owner" and add Settings step for
removing owners
### Files Modified:
1. **docs/user/guides/manage-read-the-docs-teams.rst**:
- Added comprehensive instructions for managing organization owners
- Corrected steps to include Settings → Owners → Invite owner workflow
- Added note that user must be an owner to add another owner
- Fixed button label from "Add owner" to "Invite owner"
- Added Settings step to removing owners workflow for consistency
2. **docs/user/commercial/organizations.rst**: Updated reference to
reflect expanded guide scope
The documentation now provides accurate, step-by-step instructions for
adding and removing organization owners.
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<details>
<summary>Original prompt</summary>
>
> ----
>
> *This section details on the original issue you should resolve*
>
> <issue_title>Docs: add instruction about adding owner to
organization</issue_title>
> <issue_description>This should be documented in at least
https://docs.readthedocs.com/platform/stable/commercial/organizations.html,
or maybe have a page like
https://docs.readthedocs.com/platform/stable/guides/manage-read-the-docs-teams.html</issue_description>
>
> ## Comments on the Issue (you are @copilot in this section)
>
> <comments>
> </comments>
>
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- Fixes readthedocs/readthedocs.org#12759
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