feat stacktraces and exceptions

[marandaneto]

📢 Type of change

• Bugfix
• New feature
• Enhancement
• Refactoring

📜 Description

💡 Motivation and Context

💚 How did you test it?

📝 Checklist

• I reviewed submitted code
• I added tests to verify changes
• All tests passing

🔮 Next steps

[codecov-io]

Codecov Report

Merging #61 into master will increase coverage by 4.16%.
The diff coverage is 81.17%.

@@             Coverage Diff              @@
##             master      #61      +/-   ##
============================================
+ Coverage     44.62%   48.79%   +4.16%     
- Complexity      243      281      +38     
============================================
  Files            52       56       +4     
  Lines          1443     1494      +51     
  Branches         90       94       +4     
============================================
+ Hits            644      729      +85     
+ Misses          767      730      -37     
- Partials         32       35       +3

Impacted Files	Coverage Δ	Complexity Δ
...java/io/sentry/core/protocol/SentryStackTrace.java	77.77% <ø> (+33.33%)	4 <0> (+2)	⬆️
...ore/src/main/java/io/sentry/core/SentryClient.java	81.08% <ø> (+6.08%)	11 <0> (-1)	⬇️
...core/src/main/java/io/sentry/core/SentryEvent.java	30.58% <0%> (+2.49%)	13 <0> (+1)	⬆️
.../main/java/io/sentry/core/SentryThreadFactory.java	100% <100%> (ø)	10 <0> (-3)	⬇️
...n/java/io/sentry/core/SentryStackTraceFactory.java	100% <100%> (ø)	4 <4> (?)
...re/src/main/java/io/sentry/core/SentryOptions.java	78.68% <100%> (+0.35%)	29 <0> (ø)	⬇️
...ry/core/exception/ExceptionMechanismThrowable.java	100% <100%> (ø)	3 <3> (?)
...java/io/sentry/core/protocol/SentryStackFrame.java	28.07% <20%> (+8.77%)	11 <2> (+5)	⬆️
...c/main/java/io/sentry/core/MainEventProcessor.java	81.25% <81.25%> (ø)	4 <4> (?)
...in/java/io/sentry/core/SentryExceptionFactory.java	91.66% <91.66%> (ø)	7 <7> (?)
... and 9 more

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[bruno-garcia]

Approved, just left one nit for a test