Panic on unhandled Dart exceptions

[alexlapa]

Synopsis

Atm if Rust calls Dart and Dart throws an exception, Rust might not notice this and just continue execution. For example this happened in #174

Solution

Modify #[dart_bridge] to wrap each function in try-catch and require all bindings to have a Result return.

Checklist

• Created PR:
  • [x] In draft mode
  • [x] Name contains issue reference
  • [x] Has type and k:: labels applied
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• Before review:
  • [x] Documentation is updated (if required)
  • [x] Tests are updated (if required)
  • [x] Changes conform code style
  • [x] CHANGELOG entry is added (if required)
  • [x] FCM (final commit message) is posted or updated
  • [x] Draft mode is removed
• [x] Review is completed and changes are approved
  • [x] FCM (final commit message) is approved
• Before merge:
  • [x] Milestone is set
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[alexlapa]

FCM:

Panic on unhandled Dart exceptions (#176)