[Feature] 3rd Party Tool Integration (Dify, AnythingLLM, MCP)

## Description
- Submit PRs/Plugins for **Dify** and **AnythingLLM**
- Support **MCP** (Model Context Protocol)

## Motivation
- No Parallax option in Dify
- Users manually input API URL
- MCP compatibility requested

**Priority:** P1 | **Category:** Integrations