feat: get document content by tabs

[juansepl]

🚀 Enhanced Google Docs Content Extraction with Tables and Tabs Support
Summary
This PR introduces significant improvements to Google Docs content extraction capabilities, adding support for processing tables, tabs, and other document elements with better formatting and structure preservation.

🆕 New Features

1. New Tool:
   get_doc_content_with_tabs
   Added a new MCP tool specifically designed for documents containing tabs
   Uses Google Docs API's includeTabsContent=True parameter to retrieve complete tab structure
   Processes both main document content and all tab content recursively
   Supports child tabs and nested tab structures
2. Enhanced Content Processing
   Table Support: Added comprehensive table processing with proper markdown-style formatting
   Extracts table rows and cells with proper alignment
   Includes header row separation
   Preserves table structure and cell content
   Advanced Paragraph Processing: Improved paragraph handling with support for:
   Bullet lists and numbered lists with proper indentation
   Nested list structures
   Rich text formatting preservation
   Additional Element Support:
   Section breaks detection
   Table of contents recognition
   Better handling of various document elements
3. Improved Document Structure
   Hierarchical Processing: Recursive processing of document elements
   Better Content Organization: Clear separation between main content and tabs
   Enhanced Metadata: Detailed tab information including titles, indices, and IDs
   🔧 Technical Improvements
   Authentication & Service Management
   Updated service decorators to use require_multiple_services for better service management
   Improved parameter handling in
   start_google_auth
   function
   Enhanced error handling for document processing operations
   Code Structure
   Modular content processing functions:
   process_paragraph()
   : Handles paragraph elements with formatting
   process_table()
   : Extracts and formats table content
   process_content_elements()
   : Recursively processes mixed content types
   Better separation of concerns between content extraction and formatting
   📊 Features Added
   Content Types Now Supported:

✅ Tables with proper markdown formatting
✅ Bullet and numbered lists with indentation
✅ Document tabs and child tabs
✅ Section breaks and document structure elements
✅ Table of contents sections
✅ Rich text formatting preservation
API Enhancements:

✅ includeTabsContent parameter usage
✅ Recursive tab processing
✅ Enhanced metadata extraction
✅ Better error handling and logging
🎯 Use Cases
This enhancement enables:

Complex Document Processing: Handle large documents with multiple tabs and sections
Structured Content Extraction: Extract tables and lists with proper formatting
Document Navigation: Access specific tabs and sections within documents
Content Analysis: Better understanding of document structure and organization
🧪 Testing
Tested with documents containing multiple tabs and child tabs
Verified table extraction with various table structures
Confirmed proper handling of nested content elements
Validated formatting preservation across different content types
📝 Files Modified
gdocs/docs_tools.py
: Added new tool and enhanced content processing
core/server.py
: Updated authentication parameter handling
This PR significantly enhances the Google Docs integration capabilities, making it possible to extract and process complex document structures with high fidelity.