fix: reorder import statements for consistency

Co-authored-by: Copilot <copilot@github.com>

Author: ethanyhou

com.microsoft.copilot.eclipse.ui/src/com/microsoft/copilot/eclipse/ui/chat/services/ChatCompletionService.java

@@ -29,8 +29,8 @@
 import com.microsoft.copilot.eclipse.core.Constants;
 import com.microsoft.copilot.eclipse.core.CopilotAuthStatusListener;
 import com.microsoft.copilot.eclipse.core.CopilotCore;
-import com.microsoft.copilot.eclipse.core.events.CopilotEventConstants;
 import com.microsoft.copilot.eclipse.core.FeatureFlags;
+import com.microsoft.copilot.eclipse.core.events.CopilotEventConstants;
 import com.microsoft.copilot.eclipse.core.lsp.CopilotLanguageServerConnection;
 import com.microsoft.copilot.eclipse.core.lsp.protocol.ChatMode;
 import com.microsoft.copilot.eclipse.core.lsp.protocol.ConversationAgent;