Adds Google Drive API support and Service Account Auth

[Forbrig]

Ticket: https://bitovi.atlassian.net/browse/FE-663

This pull request introduces Google Drive service account support, including detailed documentation, a CLI utility script, and new dependencies for Google and AWS SDKs. The main focus is on enabling secure, server-to-server authentication with Google Drive using service account credentials, while emphasizing critical security practices and providing clear setup and usage instructions.

Documentation & Security Guidance:

• Comprehensive Service Account Guide: Added docs/google-service-account.md with step-by-step instructions, screenshots, security warnings, best practices, troubleshooting, and alternatives for setting up and using Google service accounts securely.
• REST API Documentation Updates: Updated docs/rest-api.md to reference the new service account guide, provide a quick setup checklist, and document the new /api/drive-about-user endpoint, including usage examples and security considerations. [1] [2]

New Functionality:

• CLI Script for Service Account Testing: Added scripts/api/drive-about-user.ts, a script to fetch authenticated user info from Google Drive using service account credentials, with options for different credential sources and robust error handling.

Dependency Management:

• Google & AWS SDKs: Added googleapis and @aws-sdk/client-cloudwatch-logs as dependencies in package.json to support Google Drive API integration and (potentially) logging. [1] [2]

Key changes by theme:

Documentation & Security

• Added a detailed Google service account setup and security guide, including critical warnings, usage scenarios, and best practices.
• Updated REST API docs to reference the guide, document the new endpoint, and provide clear security warnings and usage instructions. [1] [2]

Functionality

• Introduced a CLI utility script to test service account authentication and retrieve user info from Google Drive, supporting multiple credential-loading methods and user-friendly error messages.

Dependencies

• Added googleapis and AWS CloudWatch Logs SDK to package.json to enable Google Drive API access and enhance logging capabilities. [1] [2]

[justinbmeyer]

See the inline comments. Docs need to be a bit more concise and some other minor improvements.