Improve support for Flutter Web

* [X] [Support tracingOrigins for performance feature](https://github.com/getsentry/sentry-dart/issues/604) - replaced by `tracePropagationTargets`
* [X] [Add Flutter web renderer information to event](https://github.com/getsentry/sentry-dart/issues/687)
* [x] [Support allowUrls , denyUrls and ignoreErrors (InboundFilters)](https://github.com/getsentry/sentry-dart/issues/626)
* [ ] Breadcrumbs and spans for fetch/xmlhttprequest thru the JS SDK (gotta check if this is even useful, does dart's http request bridge with native fetch requests?)
* [ ] [Support for tunnel parameter](https://github.com/getsentry/sentry-dart/issues/872)
* [x] Native JS error handler thru the JS SDK
* [ ] [Web vitals](https://docs.sentry.io/product/insights/frontend/web-vitals/) - not sure how much that makes sense since Flutter is canvas based, TTFB make sense for example
* [x] https://github.com/getsentry/sentry-dart/issues/2716
* [ ] https://github.com/getsentry/sentry-dart/issues/1480
* [X] [Improve stack trace symbolication](https://github.com/getsentry/symbolic/issues/791), related [issue](https://github.com/dart-lang/sdk/issues/52483).
* [x] ~Read buildNumber and buildName (and use as release/dist)~
* [x] [Migrate source maps to use the new debug id](https://github.com/getsentry/team-mobile/issues/133) - https://github.com/dart-lang/sdk/issues/53027
* [ ] [Demangle runtime types](https://github.com/getsentry/symbolic/issues/807)
* [x] Support for apps loaded as [Chrome extension](https://github.com/getsentry/sentry-dart/issues/897#issuecomment-2060592060) -> Symbolication of Dart stacktraces of chrome extension apps work. Will update the docs on how to set this up

Likely more improvements can be made.