Add .env.example for Ollama LLM provider config

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.env.example

@@ -1,14 +1,7 @@
-# LLM Provider: "claude", "groq", or "ollama" (auto-detects if not set)
-# LLM_PROVIDER=ollama
+# LLM Provider: anthropic, ollama, groq
+LLM_PROVIDER=ollama
+OLLAMA_MODEL=llama3.1
 
-# For Claude (paid API):
-# ANTHROPIC_API_KEY=sk-ant-api03-your-key-here
-
-# For Groq (fast cloud, free tier 30 req/min):
-# Sign up: https://console.groq.com
-# GROQ_API_KEY=gsk_your-key-here
-
-# For Ollama (free, local):
-# Install: https://ollama.com
-# Then: ollama pull llama3.1
-# No API key needed!
+# Uncomment for Groq:
+# LLM_PROVIDER=groq
+# GROQ_API_KEY=your_groq_api_key_here