Add a way to extract stacktraces from custom exception types

[kuhnroyal]

📜 Description

• add ExceptionStackTraceExtractor and use as fallback in SentryExceptionFactory
• add DioStackTraceExtractor to the dio module which extracts DioError.stackTrace

💡 Motivation and Context

See discussion in #1323
Fixes #1322

💚 How did you test it?

📝 Checklist

• I reviewed submitted code
• I added tests to verify changes
• No new PII added or SDK only sends newly added PII if sendDefaultPii is enabled
• I updated the docs if needed
• All tests passing
• No breaking changes

🔮 Next steps

CC @ueman @marandaneto

[codecov]

Codecov Report

Patch coverage: 100.00% and project coverage change: +0.02 🎉

Comparison is base (689d2fd) 90.29% compared to head (d067205) 90.31%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1335      +/-   ##
==========================================
+ Coverage   90.29%   90.31%   +0.02%     
==========================================
  Files         168      170       +2     
  Lines        5254     5266      +12     
==========================================
+ Hits         4744     4756      +12     
  Misses        510      510              

Impacted Files	Coverage Δ
dart/lib/src/exception_stacktrace_extractor.dart	100.00% <100.00%> (ø)
dart/lib/src/sentry_exception_factory.dart	100.00% <100.00%> (ø)
dart/lib/src/sentry_options.dart	83.72% <100.00%> (+0.79%)	⬆️
dio/lib/src/dio_stacktrace_extractor.dart	100.00% <100.00%> (ø)
dio/lib/src/sentry_dio_extension.dart	94.44% <100.00%> (+0.69%)	⬆️

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[kuhnroyal]

Hmm no idea about the failing workflows.

[marandaneto]

Suggested change

	StackTrace? stackTrace(DioError error) {
	dynamic stackTrace(DioError error) {

[kuhnroyal]

This one is fine, for DioError the type can be tightened.

[marandaneto]

Hmm no idea about the failing workflows.

The analyze one is due to dart-lang/pana#1020
All good.
The other one is a timeout, related to dart-lang/test#1622 most likely, so all good as well.

[marandaneto]

Thanks @kuhnroyal
Left a few comments but other than that LGTM