[WIP] Add GenAI projects specification

[Copilot]

• Create root README.md with intro, prerequisites, project map, learning path, setup, and glossary
• Create Project 1: 01-rag-from-scratch/ — RAG pipeline with document_loader, chunker, embedder, vector_store, retriever, generator
• Create Project 2: 02-legal-ai-assistant/ — Legal analysis with document_parser, summarizer, clause_extractor, risk_analyzer, conflict_detector, qa_chain
• Create Project 3: 03-research-agent/ — AI research agent with paper_parser, paper_indexer, tools (search/summary/compare), agent, gap_analyzer, report_generator
• Create Project 4: 04-multimodal-rag/ — Multimodal RAG with parsers, text/image/table indexers, query_router, multi_retriever, generator
• Create Project 5: 05-agentic-rag-realtime/ — Agentic RAG + real-time tools (web, finance, weather, wiki) with tool_registry, agent, response_formatter

Original prompt

follow @GenAI_Projects_Spec.md

Created from Copilot CLI via the copilot delegate command.

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[nerdjerry]

@copilot where are you stuck?