refactor: improve interop with objc headers

[buenaflor]

📜 Description

Combine the cinterop libraries that we had into one, remove unnecessary header files thus reducing klib file size

💡 Motivation and Context

Closes #74

💚 How did you test it?

📝 Checklist

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• I reviewed the submitted code.
• I added tests to verify the changes.
• No new PII added or SDK only sends newly added PII if sendDefaultPII is enabled.
• I updated the docs if needed.
• Review from the native team if needed.
• No breaking change or entry added to the changelog.

🔮 Next steps

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 75.43%. Comparing base (5eed211) to head (5f6bce7).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #265   +/-   ##
=======================================
  Coverage   75.43%   75.43%           
=======================================
  Files          38       38           
  Lines         574      574           
  Branches       85       85           
=======================================
  Hits          433      433           
  Misses         96       96           
  Partials       45       45           

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[romtsn]

LGTM!

I'm wondering how much more we could shave off by implementing this in the Cocoa SDK getsentry/sentry-cocoa#1999. Probably not that much work tbh, but we could do it as a next step improvement later

[github-actions]

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## Unreleased

- improve interop with objc headers ([#265](https://github.com/getsentry/sentry-kotlin-multiplatform/pull/265))

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