## Summary
Files management UI that rounds out the files MVP. This is UI is
intended to be progressively enhanced and provides a way for system
administrators get some insight and manage the files created and stored
in Kibana.
## To reviewers
* This is UI for retrieval and deletion of files (the R+D of CRUD)
* Creating and deleting tags to be supported in a future version
* This UI is intended to form part of the broader content management
experience
* We use the `TableListView` component as far as possible
## How to test
1. Start Kibana with `yarn start --run-examples`
2. Go to the "Developer Examples" from the left nav menu
3. Go to the "Files example" plugin
4. Click the "Upload file" button, upload a few different image types
(PNG, JPG and WEBP)
5. Go to "Stack management" > "Files"
6. Behold your files in the management UI
7. (Bonus) check that the UI and API `GET /api/files/find`, `GET
/api/files/metrics` and `DELETE /api/files/blobs` are not accessible to
non-admin or appropriately privileged users (i.e., those with "Files
management" access).
## List of functionality
- [x] List all saved objects (scoped to admin)
- [x] Is able to bulk-delete files
- [x] Shows basic storage diagnostics
- [x] Is able to search and filter files
## Screenshots
<details>
<summary>screenshots</summary>
<img width="1545" alt="Screenshot 2022-11-08 at 13 56 54"
src="https://user-images.githubusercontent.com/8155004/200570783-cfefdbf3-c5ff-4ece-ba24-48a455fcca75.png">
<img width="910" alt="Screenshot 2022-11-10 at 12 52 35"
src="https://user-images.githubusercontent.com/8155004/201083812-bc9f25f5-b423-43a6-9229-5e2a4cdd943a.png">
<img width="451" alt="Screenshot 2022-11-10 at 12 37 07"
src="https://user-images.githubusercontent.com/8155004/201081039-832a1980-684c-4abb-bb05-0c7c6a849d4d.png">
<img width="959" alt="Screenshot 2022-11-08 at 13 57 15"
src="https://user-images.githubusercontent.com/8155004/200570797-f122cff5-7043-4e01-9b51-d5663c1b26d6.png">
<img width="500" alt="Screenshot 2022-11-08 at 13 57 38"
src="https://user-images.githubusercontent.com/8155004/200570801-35cdbd99-0256-4dee-9f78-2f6ad853305f.png">
</details>
Co-authored-by: kibanamachine <42973632+kibanamachine@users.noreply.github.com>