feat: Manually capturing user feedback

[lucas-zimerman]

Based on getsentry/sentry-cocoa#805

This PR implements the CaptureUserFeedback so users can associate user feedback to an event.

Fixes#153

[lucas-zimerman]

🤔 Should I edit the changelog?

[bruno-garcia]

Thanks for contributing again Lucas! I left a few comments.

[bruno-garcia]

🤔 Should I edit the changelog?

Yes please

[codecov-io]

Codecov Report

Merging #559 into main will decrease coverage by 0.21%.
The diff coverage is 73.21%.

@@ Coverage Diff @@## main #559 +/- ##
==========================================
- Coverage 85.06% 84.85% -0.22% 
==========================================
Files 142 143 +1 Lines 3462 3513 +51 Branches 775 784 +9 ==========================================
+ Hits 2945 2981 +36 - Misses 310 323 +13 - Partials 207 209 +2 

Impacted Files	Coverage Δ
src/Sentry/Extensibility/DisabledHub.cs	93.33% <0.00%> (-6.67%)	⬇️
src/Sentry/Extensibility/HubAdapter.cs	91.30% <0.00%> (-4.16%)	⬇️
src/Sentry/Internal/Hub.cs	51.35% <0.00%> (-4.54%)	⬇️
src/Sentry/SentrySdk.cs	93.02% <0.00%> (-4.54%)	⬇️
src/Sentry/SentryClient.cs	77.77% <68.75%> (-2.69%)	⬇️
src/Sentry/Protocol/Envelope.cs	97.14% <100.00%> (+0.98%)	⬆️
src/Sentry/Protocol/EnvelopeItem.cs	63.93% <100.00%> (+3.22%)	⬆️
src/Sentry/Protocol/UserFeedback.cs	100.00% <100.00%> (ø)
src/Sentry/SentryClientExtensions.cs	100.00% <100.00%> (ø)

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[lucas-zimerman]

weird, the test worked fine on my computer.
@bruno-garcia I have added the following public callback to SentrySdk because there's a test that enforces me to have all defined SentryClientExtensions also defined into SentrySdk

public static void CaptureUserFeedback(SentryId eventId, string email, string comments, string? name = null)

EDIT:
https://github.com/getsentry/sentry-dotnet/projects/3#card-46143120
and
https://github.com/getsentry/sentry-dotnet/projects/3#card-46044826
could be In progress

[bruno-garcia]

Almost there! Left a couple notes.
Thanks!

[bruno-garcia]

Beautiful stuff!! Thanks a lot @lucas-zimerman