Add server control script and improve logging

\n- Add scripts/start-server.sh for easy server management\n- Add DLC_NO_COLOR environment variable support for clean logs\n- Update server.go to handle color/no-color logging\n- Add server.log and server.pid to .gitignore\n- Update README.md and AGENTS.md with server control documentation\n- Test all server control functions (start, stop, restart, status, logs, test)

README.md

@@ -101,6 +101,21 @@ go run ./cmd/greet John
 
 ### Web Server
 
+**Using the server control script (recommended):**
+
+```bash
+# Start the server
+./scripts/start-server.sh start
+
+# Test API endpoints
+./scripts/start-server.sh test
+
+# Stop the server
+./scripts/start-server.sh stop
+```
+
+**Manual server management:**
+
 ```bash
 # Start the server
 go run ./cmd/server