Add project files:

- Add database initialization scripts
- Add configuration files
- Add documentation
- Add public assets
- Add source code structure
- Update README

.env.example

@@ -0,0 +1,11 @@
+PORT=3000
+NODE_ENV=development
+SUPABASE_URL=your_supabase_url
+SUPABASE_KEY=your_supabase_key
+OLLAMA_URL=http://localhost:11434
+OLLAMA_MODEL=llama2
+SEARXNG_URL=http://localhost:4000
+SEARXNG_INSTANCES=["http://localhost:4000"]
+MAX_RESULTS_PER_QUERY=50
+CACHE_DURATION_HOURS=24
+CACHE_DURATION_DAYS=7