Docs: publish How-To guides from the wiki #1156

The OpenAM wiki contains about 50 practical articles that are not part of https://doc.openidentityplatform.org and are therefore not found by its search, for example:

• How To Run OpenAM in Kubernetes
• How to Setup WebAuthn Authentication / Two-Factor Authentication / 2FA with Google Authenticator
• How to Setup SAMLv2 Federation / OAuth2 OIDC Federation
• How to setup Kerberos Authentication, Active Directory Authentication
• OpenAM and Spring Boot 3 Integration via OIDC / SAMLv2 / OpenAM Cookie
• How to Use Apache Cassandra as User and Session DataStore; Migrate OpenAM to Apache Cassandra
• How to Develop a Custom Authentication Module; How to Create Custom DataStore
• Login via Госуслуги РФ / VK / Odnoklassniki / Facebook OAuth2 Identity Provider

Proposal

Add a how-to guide to openam-documentation/openam-doc-source/src/main/asciidoc (converted from the wiki Markdown), so it is published with the other guides, and leave the wiki pages pointing to the site.