Initial commit: MeshCore Open Flutter client

Open-source Flutter client for MeshCore LoRa mesh networking devices.

Features:
- BLE device scanning and connection
- Nordic UART Service (NUS) integration
- Material 3 design with system theme support
- Provider-based state management
- Placeholder screens for chat, contacts, and settings

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <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
+
+# Flutter plugin generated files
+.flutter-plugins
+.flutter-plugins-dependencies
+
+# Environment and secrets
+.env
+*.env
+secrets.dart
+
+# macOS
+.DS_Store
+.AppleDouble
+.LSOverride
+
+# iOS
+**/ios/Pods/
+**/ios/.symlinks/
+**/ios/Flutter/Flutter.framework
+**/ios/Flutter/Flutter.podspec
+
+# Android
+**/android/.gradle/
+**/android/captures/
+**/android/local.properties
+**/android/.externalNativeBuild/
+*.jks
+keystore.properties
+
+# Generated files
+*.g.dart
+*.freezed.dart
+*.mocks.dart
+
+# IDE
+.vscode/launch.json
+.vscode/settings.json