Update gitignore to remove printing example

@@ -24,6 +24,31 @@ printing/android/local.properties
 .idea
 *.iml
 .flutter-plugins
+
 printing/*.log
 printing/ios/Flutter
 printing/ios/Runner
+printing/example/android/app/src/main/res
+printing/example/android/build.gradle
+printing/example/android/gradle.properties
+printing/example/android/settings.gradle
+printing/example/android/app/build.gradle
+printing/example/android/app/src/main/AndroidManifest.xml
+printing/example/android/app/src/main/java/com/example/example/MainActivity.java
+printing/example/android/gradle
+printing/example/ios/Podfile
+printing/example/ios/Flutter/AppFrameworkInfo.plist
+printing/example/ios/Flutter/Debug.xcconfig
+printing/example/ios/Flutter/Release.xcconfig
+printing/example/ios/Runner/AppDelegate.h
+printing/example/ios/Runner/AppDelegate.m
+printing/example/ios/Runner/Info.plist
+printing/example/ios/Runner/main.m
+printing/example/ios/Runner/Assets.xcassets
+printing/example/ios/Runner/Base.lproj
+printing/example/ios/Runner.xcodeproj/project.pbxproj
+printing/example/ios/Runner.xcodeproj/project.xcworkspace
+printing/example/ios/Runner.xcodeproj/xcshareddata
+printing/example/ios/Runner.xcworkspace
+printing/example/.gitignore
+printing/example/.metadata