Added MigrationProviderService introspection with UI.

...internal/introspection/details/KISSDetailsUIRegistry.java

...ectionCompositorServiceIntrospectionDetailsUIHandler.java

...andler/EObjectAwareIntrospectionDetailsUIHandlerBase.java

...lementCompositorServiceIntrospectionDetailsUIHandler.java

...andler/MigrationServiceIntrospectionDetailsUIHandler.java

...org/fortiss/tooling/kernel/internal/MigrationService.java

...ction/items/MigrationServiceIntrospectionDetailsItem.java