v1: add flet-dev extensions to client

[ndonkoHenri]

Summary by Sourcery

Register flet-dev extensions in the Flutter client and enrich both the Python SDK and Flutter utilities with new types, controls, and parsing enhancements.

New Features:

• Register multiple Flet Flutter extensions (audio_recorder, geolocator, permission_handler, lottie, map, ads, rive, webview, flashlight, datatable2) in pubspec, main.dart, and platform plugin registrants.
• Introduce a BorderStyle enum and style support in Python SDK’s BorderSide and update Border and BorderRadius APIs with copy_with, zero/static methods, and arithmetic operators.
• Add Size and Rect geometry types, along with parsing and utility methods, to the Python SDK.
• Add SnackBarAction control in Python SDK to enable richly styled and interactive snack bar actions.
• Enhance Python SDK’s Tooltip with default decoration, wait/exit durations, enable_tap_to_dismiss default, and mouse cursor support.
• Expose Duration.copy_with, refine Duration arithmetic, and import Number in Python SDK.

Enhancements:

• Set default shape for BoxDecoration to RECTANGLE and enforce post-init assertions.
• Update Flutter utility parsers for borders, geometry, and tooltips, and improve DataTable control mapping and naming consistency.
• Add convenience methods (Padding.zero, Offset.zero) and refine docs and default values across base controls.

[ndonkoHenri]

@sourcery-ai review

[sourcery-ai]

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