Add Agentic LangGraph RAG Tutorial with Fixed Image Paths

[Goodnight77]

Summary

This PR introduces a new tutorial: Agentic PDF RAG System.

Key changes:

• Added Agentic_PDF_RAG.ipynb notebook under Agentic-langGraph-RAG/
• Created a detailed readme.md explaining the system architecture and usage
• Fixed broken image paths in qdrant_101_audio_data/README.md and qdrant_101_text_data/README.md
• Updated root README.md to include a link to the new tutorial

Motivation

This tutorial demonstrates how to combine LangGraph, Qdrant, and GPT-4o to build an intelligent PDF-based RAG pipeline. It also fixes image rendering issues in existing docs.

Benefits

• Provides a step-by-step guide for developers exploring agentic RAG with Qdrant
• Ensures all README images render correctly

[Goodnight77]

Summary

This PR introduces a new tutorial: Agentic PDF RAG System.

Key changes:

• Added Agentic_PDF_RAG.ipynb notebook under Agentic-langGraph-RAG/
• Created a detailed readme.md explaining the system architecture and usage
• Fixed broken image paths in qdrant_101_audio_data/README.md and qdrant_101_text_data/README.md
• Updated root README.md to include a link to the new tutorial

Motivation

This tutorial demonstrates how to combine LangGraph, Qdrant, and GPT-4o to build an intelligent PDF-based RAG pipeline. It also fixes image rendering issues in existing docs.

Benefits

• Provides a step-by-step guide for developers exploring agentic RAG with Qdrant
• Ensures all README images render correctly

[Goodnight77]

@kacperlukawski