feat: MeshCore SAR - Flutter BLE mesh radio companion app

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.gitignore

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+# Miscellaneous
+*.class
+*.log
+*.pyc
+*.swp
+.DS_Store
+.atom/
+.build/
+.buildlog/
+.history
+.svn/
+.swiftpm/
+migrate_working_dir/
+
+# IntelliJ related
+*.iml
+*.ipr
+*.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-dependencies
+.pub-cache/
+.pub/
+/build/
+/coverage/
+
+# Symbolication related
+app.*.symbols
+
+# Obfuscation related
+app.*.map.json
+
+# Android Studio will place build artifacts here
+/android/app/debug
+/android/app/profile
+/android/app/release
+
+# Android signing
+android/key.properties
+android/app/*.keystore
+android/app/*.jks
+*.jks
+*.keystore
+*.zip
+*.ipa
+ios/Runner.app.dSYM.zip
+ios/Runner.ipa
+ios/build/ios/XCBuildData/PIFCache
+
+# iOS signing & certificates
+*.p8
+*.p12
+*.cer
+*.mobileprovision
+*.certSigningRequest
+
+# Firebase / Google services (contain API keys)
+google-services.json
+GoogleService-Info.plist
+
+# Fastlane credentials — store credentials in CI env vars, not files
+**/fastlane/Appfile
+**/fastlane/.env
+**/fastlane/.env.*
+fastlane/README.md
+
+# Play Store release assets & scripts
+play-store/
+create_feature_graphic.py
+
+# Tool caches and local state
+.cachebro/
+.osgrep/
+
+# Claude Code local settings (permissions, personal config)
+.claude/settings.local.json
+
+# Dart code coverage
+coverage/
+lcov.info