Enhanced configuration use cases for openDesk

# Overview The following enhanced configuration use cases are described in separate documents. - [Separate mail & Matrix domain](./enhanced-configuration/separate-mail-matrix-domain.md) - [Federation with external identity provider](./enhanced-configuration/idp-federation.md) - [Matrix federation](./enhanced-configuration/matrix-federation.md) - [Groupware migration from M365 to openDesk](./enhanced-configuration/groupware-migration.md) - [Self-signed certificate and custom Certificate Authority (CA)](./enhanced-configuration/self-signed-certificates.md) - [GitOps deployments using Argo CD](./enhanced-configuration/gitops.md)