Update repo structure with detailed project docs

rag-hub.md

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+# RAG Knowledge Hub
+
+## Problem
+Technical knowledge about personal infrastructure is scattered across config files, chat history, and stale documentation.
+
+## Instructions
+1. **Data Collection:** Crawl your , , and project directories for configuration files (, , ).
+2. **Embedding:** Use an embedding pipeline to vectorize this knowledge.
+3. **Retrieval:** Set up a web interface or terminal bot that allows querying your "Second Brain".
+4. **Sync Mechanism:** Create a task that updates the vector database whenever a config file is modified (using  or ).
+
+## Goal
+Create an infrastructure-aware assistant that knows your setup intimately.