Ship Webapp as a `PlatformService`

[GenosseOtt]

Description

As a team operating Open Control Plane stack in my organization.
I want to give all teams simple access to the https://github.com/openmcp-project/ui-frontend that belongs to this project.

Depends on

• Epic: Enable PlatformService contributions #514
• Make UI-Frontend truely whitelabel
  • Branding (org internal name may differ, logos of org hosting this)
  • Custom OTEL endpoints
  • ....

Scope

• PlatformService is available for Operators to install
• End users of platform can consume Projects/Worksapces/ControlPlanes and their content via UI
• Solution is customizable (B)