feat: support attaching bytes

[jpnurmi]

Q: Should it be called sentry_attach_buffer or sentry_attach_data?
A: sentry_attach_bytes

TODO:

• Crashpad: IPC
  • feat: support attaching bytes on Windows and Linux crashpad#127 (write files instead due to IPC limits)
• Crashpad: filenames must be unique
  • feat: ensure unique file names for attachments crashpad#129
• Integration tests
• Docs
  • feat(native): attach bytes sentry-docs#14077
  • Consider copying Size Limits and linking from the API docs?

[github-actions]

	Messages
📖	Do not forget to update Sentry-docs with your feature once the pull request gets approved.

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[supervacuus]

If we want to stay consistent with other SDKs, bytes is fine since we also use it for the UUID API in a similar manner. data is somewhat unspecific. We use data in the context of user_data for callbacks (but only as parameter specs) and data as the field for transactions and spans (as part of the function names).

[supervacuus]

This looks nice, thanks! A couple of minor points and one thing that is probably just a limit of my imagination.

[supervacuus]

I don't know if you'd still like to add anything, but from my end, this is ready to be released.

[jpnurmi]

I don't have anything else in mind regarding attachments. We should now have everything that was requested. Thanks for your time reviewing yet another big PR.