Add Google Search service with advanced features

- Implement multi-method search (Custom Search API, SerpAPI, web scraping)
- Support up to 20 results with pagination
- Add date filtering and sorting capabilities
- Include full content fetching option
- Add country/language specific search support
- Implement Redis caching for performance
- Create comprehensive documentation

🤖 Generated with [Claude Code](https://claude.ai/code)

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

services/google-search/backend/.env.example

@@ -0,0 +1,21 @@
+# Google Custom Search API Configuration
+# Get your API key from: https://console.cloud.google.com/apis/credentials
+GOOGLE_API_KEY=
+
+# Get your Search Engine ID from: https://programmablesearchengine.google.com/
+GOOGLE_SEARCH_ENGINE_ID=
+
+# Alternative: SerpAPI Configuration  
+# Get your API key from: https://serpapi.com/
+SERPAPI_KEY=
+
+# Redis Configuration
+REDIS_HOST=redis
+REDIS_PORT=6379
+REDIS_DB=2
+
+# Search Settings
+DEFAULT_LANGUAGE=ko
+DEFAULT_COUNTRY=kr
+CACHE_TTL=3600
+MAX_RESULTS=10