[CMS] Add Integration with Microsoft SharePoint

[ThuF]

Overview

Introduce native integration between Eclipse Dirigible CMS capabilities (CMS SDK @aerokit/sdk/cms and Documents Perspective) and Microsoft SharePoint. This will extend the existing CMS integrations (File System and AWS S3) by enabling seamless access, management, and synchronization of documents stored in SharePoint. Ensure extensibility for future providers (e.g., Google Drive, OneDrive)

Scope

• Extend the existing CMS SDK to support SharePoint as a storage provider
• Enhance the Documents Perspective to support browsing and managing SharePoint content

Acceptance Criteria

• SharePoint repository can be configured and initialized
• @aerokit/sdk/cms SDK supports CRUD operations on SharePoint
• Configuration is happening through environment variables
• Error handling and logging are consistent with other providers
• Documents Perspective can browse and manage SharePoint files

[iliyan-velichkov]

1. Do we know some library which could be used?
2. Do we have SharePoint instance which I can use?