Introduce UI-Based Configuration for OAuth/SSO Providers

Describe the Improvement Feature Request Summary: Directus currently requires OAuth/SSO configurations to be set through environment variables, which can be a barrier to less technical users and adds complexity when managing multiple environments. This feature request suggests implementing a UI-based configuration system for OAuth/SSO providers within the Directus dashboard, drawing inspiration from how Appwrite simplifies this process through its UI. Problem Statement: The necessity to configure OAuth/SSO through .env files or environment variables directly can deter users unfamiliar with these practices, making it less accessible for a broader audience. It also complicates configuration management across development, staging, and production environments, potentially leading to errors or misconfigurations. Proposed Solution: Implementing a UI-based system within the Directus dashboard for configuring OAuth/SSO providers would significantly enhance usability and accessibi…