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)

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 5259ffd...6b628aa. Read the comment docs.

[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