Update MCP server to use domain-specific endpoints

Changes:
- Updated default endpoints to use https://hive.home.deepblack.cloud
- Added support for HIVE_TIMEOUT environment variable
- Created .env.example with multiple deployment configurations
- Updated Claude Desktop configuration for production/development
- Updated README with comprehensive configuration guide

Production endpoints:
- API: https://hive.home.deepblack.cloud
- WebSocket: wss://hive.home.deepblack.cloud

Development fallback to localhost still available via env vars.

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

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

mcp-server/.env.example

@@ -0,0 +1,16 @@
+# Hive MCP Server Configuration
+
+# Production deployment (default)
+HIVE_API_URL=https://hive.home.deepblack.cloud
+HIVE_WS_URL=wss://hive.home.deepblack.cloud
+
+# Development/testing with local deployment
+# HIVE_API_URL=http://localhost:8087
+# HIVE_WS_URL=ws://localhost:8087
+
+# Development/testing with local docker compose
+# HIVE_API_URL=http://localhost:3001
+# HIVE_WS_URL=ws://localhost:3001
+
+# Timeout settings
+HIVE_TIMEOUT=30000