feat(apple): Add docs for app hangs v2

[philipphofmann]

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Add docs for the experimental feature app hangs V2 for the Cocoa SDK.

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[codecov]

Bundle Report

Changes will decrease total bundle size by 15 bytes (-0.0%) ⬇️. This is within the configured threshold ✅

Detailed changes

Bundle name	Size	Change
sentry-docs-server-cjs	7.45MB	6 bytes (-0.0%) ⬇️
sentry-docs-edge-server-array-push	257.07kB	3 bytes (-0.0%) ⬇️
sentry-docs-client-array-push	6.42MB	6 bytes (-0.0%) ⬇️

[coolguyzone]

Hey @philipphofmann, I removed some of the line breaks here which helps make the docs a bit easier to edit, as well as made a few content suggestions. Feel free to ping me if you have any questions about them, otherwise looks good to merge!

[lizokm]

Thanks for updating!