Capture Minidumps from Windows players

[bruno-garcia]

This issue will track adding support for Minidumps on Windows builds.

One approach is to bundle sentry-native with a crashpad backend. That would not only add minidump support but the Sentry SDK API so users can add tags and other data to crashes using Sentry's SDK. This project provides Sentry's native SDK bundled in a NuGet package.

[LukasKastern]

I've demonstrated another approach in this sample
The sample I linked shows how a .net 5 app can be used to track Unity's crash handler.

That way we can use the dump and logs that unity already generates when the game crashes and forward those to sentry.

[bruno-garcia]

I believe the SDk already captures minidump after #380 and we're just missing some extra features like symbol upload:

See #527