Ella E. 32704c42d0
UX: Update banner image field to use help text (#30666)
### What's changed?
- Add support for`@helpText` in the FormKit component.
- Updated the about config page to replace `@description` with
`@helpText` for the banner image field

### Before
<img width="525" alt="image"
src="https://github.com/user-attachments/assets/e8cdcca7-1b46-406f-8b6b-815e65dd5d9c"
/>

### After
<img width="256" alt="image"
src="https://github.com/user-attachments/assets/8656b866-5654-4f67-8515-f58a7b2b14c0"
/>


Internal: /t/138358/2
2025-02-10 19:48:31 -07:00
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