Add basic "how to's" for the service's functionality

[decentralgabe]

How to's that demonstrate basic usage of the APIs/functionality for:

• Creating a DID - done in Update READMEs, docs, add how-tos section, first how-to for DIDs #607
• Creating a Schema - done in Tutorials for schemas and credentials #610
• Issuing a Credential - done in Tutorials for schemas and credentials #610
• Verifying a Credential - done in How tos on credential status and verification #616
• Changing the Status of a Credential - done in How tos on credential status and verification #616
• Creating a Well Known File for your DID - done in Adding how-to for DID Configuration #611
• How To: Accepting Applications for and Issuing Credentials using Credential Manifest #622
• How To: Requesting and Verifying Credentials with Presentation Exchange #623

Maybe some more around webhooks, operations, etc.

[decentralgabe]

closing in favor of #622 and #623 initial set of how tos are already done