chore(ignore): ignore NUL file and common build outputs

.gitignore

@@ -1,71 +1,6 @@
-# Built application files
-*.apk
-*.ap_
-*.aab
+# Ignore Windows reserved files
+NUL
 
-# Files for the ART/Dalvik VM
-*.dex
-
-# Java class files
-*.class
-
-# Generated files
-bin/
-gen/
-out/
-
-# Gradle files
+# Android/ Gradle build outputs (optional for CI, can be kept locally if desired)
+**/build/
 .gradle/
-build/
-
-# Local configuration file (sdk path, etc)
-local.properties
-
-# Proguard folder generated by Eclipse
-proguard/
-
-# Log Files
-*.log
-
-# Android Studio Navigation editor temp files
-.navigation/
-
-# Android Studio captures folder
-captures/
-
-# IntelliJ
-*.iml
-.idea/
-
-# Keystore files
-*.jks
-*.keystore
-
-# External native build folder generated in Android Studio 2.2 and later
-.externalNativeBuild
-.cxx/
-
-# Google Services (API key)
-google-services.json
-
-# Freeline
-freeline.py
-freeline/
-freeline_project_description.json
-
-# fastjson
-fastjson/
-
-# Test folder
-test/
-tests/
-
-# Python
-__pycache__/
-*.py[cod]
-*$py.class
-
-# Airtest
-*.log
-*.png
-report/