Adds DatabricksIcon.svelte (brand mark, #FF3621) and registers it under
`databricks` in the shared APP_TO_ICON_COMPONENT map, so both the app and
hub frontends pick it up for the new Databricks hub integration.
Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Co-authored-by: Ruben Fiszel <ruben@windmill.dev>