Restructure repository into topic-based organization

[zainhas]

Note

Reorganizes the repo into topic-based directories, adds consolidated RAG/Search and Tools/Integrations content, introduces Instant Clusters docs, updates paths/Colab badges, and removes duplicated root notebooks.

• Repo Restructure:
  • Move notebooks into topic-based dirs: RAG_and_Search/, Tools_and_Integrations/ (Agent_Frameworks, Code_Execution), and Together_Instant_Clusters/.
  • Remove/replace root-level duplicates (e.g., Search_with_Reranking.ipynb, Semantic_Search.ipynb, Text_RAG.ipynb, Together_Code_Interpreter.ipynb).
• RAG and Search:
  • Add/relocate notebooks: Text_RAG, Semantic_Search, Search_with_Reranking, RAG_with_Reasoning_Models, Embedding_Visualization, and README.
  • Fix Colab links and internal image paths.
• Tools & Integrations:
  • Add consolidated README and notebooks for agent frameworks (LangGraph, DSPy, Agno, Composio, Arcade, KlavisAI, PydanticAI) with updated paths/badges/images.
  • Add Code_Execution/Together_Code_Interpreter.ipynb (moved/updated) and related docs.
• Clusters:
  • Introduce Together_Instant_Clusters/ with README and GRPO example reference.
• Top-level README:
  • Major reorganization into Quickstarts, RAG, Agents, Fine-tuning, Evals, Tools & Integrations, Clusters, Multimodal; update links and images.

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