clean up gitignore (#2360)

Co-authored-by: AR Abdul Azeez <abdul@onesignal.com>

Author: abdulraqeeb33

.gitignore

@@ -1,35 +1,37 @@
-# See https://help.github.com/articles/ignoring-files for more about ignoring files.
-#
-# If you find yourself ignoring temporary files generated by your text editor
-# or operating system, you probably want to add a global ignore instead:
-#   git config --global core.excludesfile '~/.gitignore_global'
+# Gradle
+.gradle/
+build/
+*/build/
 
+# Local properties
+local.properties
+OneSignalSDK/local.properties
+Examples/OneSignalDemo/local.properties
 
-# Ignore all logfiles and tempfiles.
-/log/*.log
-/tmp
+# macOS
+.DS_Store
 
-# built application files
-*.apk
-*.ap_
-
-# files for the dex VM
-*.dex
+# IDE files
+.idea/
+*.iml
 
-# Java class files
-*.class
+# Captures
+captures/
+OneSignalSDK/captures/
+Examples/OneSignalDemo/captures/
 
-# generated files
-bin/
-gen/
+# GPG files
+*.gpg
 
-# Proguard folder generated by Eclipse
-proguard/
+# Misc
+*.log
+*.tmp
+*.swp
+*.swo
 
-# Examples
+# Node modules (if using JS tooling)
+node_modules/
 
-.idea/
-Examples/.idea/
-Examples/AndroidStudio/
-Examples/OneSignalDemo/app/build/
-OneSignalSDK/app/build/
+# Android Studio
+*.apk
+*.ap_