chore: Better ignore rules

Based on https://github.com/github/gitignore/blob/main/Flutter.gitignore

Signed-off-by: Pun Butrach <pun.butrach@gmail.com>

.gitignore

@@ -1,14 +1,14 @@
 # Miscellaneous
 *.class
+*.lock
 *.log
 *.pyc
 *.swp
-.DS_Store
-.atom/
 .buildlog/
 .history
-.svn/
-migrate_working_dir/
+
+# packages file containing multi-root paths
+.packages.generated
 
 # IntelliJ related
 *.iml
@@ -16,32 +16,41 @@ migrate_working_dir/
 *.iws
 .idea/
 
-# The .vscode folder contains launch configuration and tasks you configure in
-# VS Code which you may wish to be included in version control, so this line
-# is commented out by default.
-#.vscode/
-
 # Flutter/Dart/Pub related
 **/doc/api/
-**/ios/Flutter/.last_build_id
 .dart_tool/
 .flutter-plugins
 .flutter-plugins-dependencies
-.pub-cache/
+**/generated_plugin_registrant.dart
+.packages
+.pub-preload-cache/
 .pub/
-/build/
+build/
+flutter_*.png
+linked_*.ds
+unlinked.ds
+unlinked_spec.ds
 
-# Symbolication related
+# Android related
+**/android/**/gradle-wrapper.jar
+.gradle/
+**/android/captures/
+**/android/gradlew
+**/android/gradlew.bat
+**/android/local.properties
+**/android/**/GeneratedPluginRegistrant.java
+**/android/key.properties
+*.jks
+
+# Coverage
+coverage/
+
+# Symbols
 app.*.symbols
 
 # Obfuscation related
 app.*.map.json
 
-# Android Studio will place build artifacts here
-/android/app/debug
-/android/app/profile
-/android/app/release
-
 # Generated files
 android/app/.cxx
 **/*.g.dart