Add HTTP Connector documentation and update navigation

[oblomov-dev]

Summary

This PR adds documentation for the HTTP Connector, a new communication channel for calling abap2UI5 apps remotely between ABAP systems. The documentation is integrated into the advanced guides section with updated navigation structure.

Key Changes

• New Documentation: Added docs/advanced/http.md with comprehensive HTTP Connector guide covering:

  • Overview and comparison to RFC Connector
  • Use cases (Frontend/Backend split, legacy systems, multi-system landscapes, cross-network scenarios)
  • Architecture explanation
  • Installation steps and prerequisites
  • Link to GitHub repository for latest updates

• Navigation Update: Modified docs/.vitepress/config.mjs to:

  • Nest HTTP Connector under RFC Connector as a collapsible submenu item
  • Maintain logical grouping of connector-related documentation

Implementation Details

The HTTP Connector documentation follows the same structure and style as existing advanced guides. It emphasizes the key differentiator from RFC (HTTP vs RFC communication channel) and provides practical guidance on when and how to use the connector in various system landscapes.

https://claude.ai/code/session_01WcXQVjpuLcfxdHSaQH3Dhj