Show index details in Orbit configuration
### Problem to Solve
With the following we'll have data to show to admins to confirm the state of the index/indexing activity. We need to represent this in the frontend so admin users can understand state of the system.
* https://gitlab.com/gitlab-org/gitlab/-/merge_requests/231381
* https://gitlab.com/gitlab-org/orbit/knowledge-graph/-/merge_requests/882
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### Proposed Solution
branch: [nleonard/orbit-settings-indexing](https://gitlab.com/gitlab-org/gitlab/-/tree/nleonard/orbit-settings-indexing?ref_type=heads)
| .com | sm |
|------|----|
| {width=727 height=600} | {width=727 height=600} |
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