feat: upload holder credentials via HTTP API

[nanderstabel]

Description of change

This update allows users to send their credentials directly through the designated POST /v0/holder/credentials in JWT format.

This update allows users to upload their own credentials directly to UniCore securely. With this change, users can add and manage credentials that weren’t originally issued by UniCore, making it easier to integrate and use a variety of credentials within the platform.

Example:

POST /v0/holder/credentials HTTP/1.1
Host: "https://my-server.com"
Content-Type: application/json
Content-Length: 947

{
    "credential": "eyJ0eXAiOiJKV1QiLCJhbGciOiJFZERTQSIsImtpZCI6ImRpZDprZXk6ejZNa2dFODROQ01wTWVBeDlqSzljZjVXNEc4Z2NaOXh1d0p2RzFlN3dOazhLQ2d0I3o2TWtnRTg0TkNNcE1lQXg5aks5Y2Y1VzRHOGdjWjl4dXdKdkcxZTd3Tms4S0NndCJ9.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.d4QN73vDtZu79RP6GldHObu6rGsjidkLYp0XMRQNbNPY75LJoSv2iXk2Rz5M-VMBZGSU3YPZHytlrKBjxr1IBQ"
}

In a future improvement we should make sure that UniCore will/can validate the credential's schema and validity (related to #151)

Links to any relevant issues

n/a

How the change has been tested

Tested through updated Postman Collection (see Add signed Holder Credential request).

Definition of Done checklist

Add an x to the boxes that are relevant to your changes.

• I have followed the contribution guidelines for this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• I have successfully tested this change in a docker environment

[M-Adam-Hus]

feat: create Presentations using raw Credentials

[github-actions]

🎉 This PR is included in version 1.0.0-beta.8 🎉

The release is available on GitHub release

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