Review & update MIW documentation

[OSchlienz]

Exisiting MIW documentation needs to be reviewed and consitently updated regarding changes due to issuer component and issuance flow 2.0, token service and verifiable presentation flow, new credential type and schemas.

• [ ] Arc24 documentation: https://github.com/eclipse-tractusx/managed-identity-wallet/blob/main/docs/arc42/main.md
• [ ] Administrators Guide: https://github.com/eclipse-tractusx/managed-identity-wallet#administrator-documentation
• [ ] End-User manual: https://github.com/eclipse-tractusx/managed-identity-wallet#end-users
• [ ] Interface documentation: https://managed-identity-wallets-new.int.demo.catena-x.net/ui/swagger-ui/index.html
• [ ] Documentation which might needed to be transferred from Confluence due to PCWM