Ensure user facing options docs stay up-to-date

[philipphofmann]

Description

This issue aims to implement an automated process that ensures that when adding a new Options option, that option is also added to the user-facing options doc.

One idea is to have a similar bot the danger.yml that fails when a PR doesn't include a proper changelog entry, but we can come up with any process that works for us.

Some edge cases to cover:

• Ignore specific options with reason
• The Cocoa SDK PR adding new options usually get merged before merging the docs PR, because we often only merge the docs PR after a Cocoa SDK release.

[linear[bot]]

COCOA-1078

[philipphofmann]

We might use a prompt as mentioned in https://github.com/getsentry/sentry-cocoa/issues/7014#issuecomment-3635920987 to automate this.