Merge Admin interfaces from openfairdb.org

[wellemut]

Problem

two backend-Frontends that seem to be not linked

1. https://openfairdb.org/entries/c5a55c7a29af46b1bbc4ea00695bce61
   
2. https://openfairdb.org/clearance
   
3. https://ofdb.io/dashboard
   

3rd one is the latest version, just hast not all features yet.

Solution plan

• import/migration
• clearencecenter
• user management

bisher implementiert in:

https://ofdb.io/dashboard

• enthalten sein soll: ansicht 'entry' history
• https://openfairdb.org/clearance?username=Clearance+Center&password=EiJ2sheChi7vou8feetia9OoCo7pohTeefei4douv4Iph3ahxaic3aic7aY2kai1eep2

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Similar Issue

• Merge backends - for for Admin Fuctions (reject / archive, approve changes) #508