Added gitignore and README

.gitignore

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+.env
+__pycache__/
+*.pyc
+*.pyo
+.DS_Store
+

README.md

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----
-title: QueryMD
-emoji: ⚡
-colorFrom: red
-colorTo: pink
-sdk: gradio
-sdk_version: 5.22.0
-app_file: app.py
-pinned: false
-license: mit
-short_description: Markdown Based Q&A with Visualization (RAG)
----
+# QueryMD
+## Gradio UI for Markdown-Based Q&A with Visualization
+
+This project integrates LangChain, ChromaDB, and OpenAI to process, store, and retrieve information efficiently.
+
+Key Features:
+- Upload Markdown files for processing
+- Visualize similarity between document chunks in 2D and 3D using embeddings
+- Ask questions and receive RAG enabled responses
+- Mantain conversation context for better question answering
+- Clear chat history when required for fresh sessions
+- Store and retrieve embeddings using ChromaDB
 
-Check out the configuration reference at https://huggingface.co/docs/hub/spaces-config-reference