Update DEVELOPMENT.md

Author: intitni

DEVELOPMENT.md

@@ -29,12 +29,13 @@ Most of the logics are implemented inside the package `Core` and `Tool`.
 
 1. Update the xcconfig files, bridgeLaunchAgent.plist, and Tool/Configs/Configurations.swift.
 2. Build or archive the Copilot for Xcode target.
-3. If Xcode complains that the pro package doesn't exist, please remove the package from the project.
 
-## Testing Source Editor Extension
+## Testing Source Editor Extension and Service
 
 Just run both the `ExtensionService`, `CommunicationBridge` and the `EditorExtension` Target. Read [Testing Your Source Editor Extension](https://developer.apple.com/documentation/xcodekit/testing_your_source_editor_extension) for more details.
 
+If you are not testing the source editor extension, it's recommended to archive and install a debug version of the Copilot for Xcode and test with the bundled source editor extension.
+
 ## SwiftUI Previews
 
 Looks like SwiftUI Previews are not very happy with Objective-C packages when running with app targets. To use previews, please switch schemes to the package product targets.