v1: add flet-dev extensions to client + remove charts

[ndonkoHenri]

Summary by Sourcery

Add support for flet-dev extensions in the Flutter client and remove built-in charts from the Python SDK. Introduce more flexible styling and utility types across both SDKs and streamline event, control, and parsing logic.

New Features:

• Introduce BorderStyle enum and extend BorderSide and Border APIs with style, stroke alignment, and copying methods
• Add SnackBarAction control to unify action handling in snack bars
• Expose core geometry types (Size, Rect) with parsing and extension methods in Python and Dart SDKs

Enhancements:

• Enrich BorderRadius and Duration with copy methods, arithmetic operations, and sensible defaults
• Simplify Tooltip defaults and decoration, unify properties, and set a default wait duration
• Refactor event handlers for DragTarget, Dismissible, Window, Container, and InteractiveViewer to use consistent event types
• Clean up control logic by moving event definitions, removing chart submodules, and restructuring parsers

Chores:

• Update Flutter client pubspec and add initialization of flet-dev plugins (audio_recorder, geolocator, permission_handler, lottie, map, ads, rive, webview, flashlight, datatable2, charts)
• Adjust iOS/macOS Info.plist and plugin registrants for new permissions and plugins
• Remove obsolete chart controls and tests from Python SDK and replace with chart stubs in test fixtures
• Bump dependency refs to v1, clean up commented code, and update CI config to install new libraries

[ndonkoHenri]

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[sourcery-ai]

We've reviewed this pull request using the Sourcery rules engine