Change favicons

[andreaskienle]

Change favicon (make sure it works in Chrome, Safari etc) and app title to ManagedControlPlane UI (for now)

• https://github.com/openmcp-project/ui-frontend/blob/0573f8c99a21a33f120b4965a47d597a83ab5d08/public/favicon.ico

Refer to these commits from the bento prototype:

• openmcp-project/ui-frontend@8d52c39
• openmcp-project/ui-frontend@7c0dfc5