chore: add archive info to readme

README.md

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 # Managed Identity Wallets <a id="introduction"></a>
 
+[![status: archive](https://github.com/GIScience/badges/raw/master/status/archive.svg)](https://github.com/GIScience/badges#archive)
+
+❗This repository is currently not under active maintenance and therefore archived. If you plan on picking up this product again, feel free to reach out ot the Eclipse Tractus-X projects leads via [mailing list](https://accounts.eclipse.org/mailing-list/tractusx-dev)
+
 The Managed Identity Wallets (MIW) service implements the Self-Sovereign-Identity (SSI) readiness by providing a wallet hosting platform including a DID resolver,service endpoints and the company wallets itself.
 
 Technically this project is developed using the [ktor](https://ktor.io) Microservices