* fix: added `RequiredSignatures` to the `BranchProtectionSettingsUpdate` types.
- Fixes#2855
- Updated `BranchProtectionSettingsUpdate` by adding `RequiredSignatures`.
- Update all integration `xUnit` tests to check for the `RequiredSignatures` property.
* docs: add comment documenting the `RequiredSignatures` property
* Add `BranchProtectionRequiredPullRequestReviews` and `BranchProtectionRequiredPullRequestReviewsUpdate` models
* Add missing ctors and fix naming
Tests where updated to use the minimum nesseccary constructor
* Fix debugger display
* Update BranchProtection response model to include new dismissal restrictions fields and tidy up existing properties ctors and DebuggerDisplay
* Update BranchProtectionUpdate request model to include new dismissal restrictions fields/classes and tidy up existing properties and DebuggerDisplay
* Update BranchProtection tests to use new RequiredReviews and dismissal restrictions options
* Add specific client endpoints for GetReviewEnforcement UpdateReviewEnforcement and RemoveReviewEnforcement
* Add unit and integration tests for new client methods
* Implement Observable client methods and unit tests
* Add integration tests for Observable client
* Run CodeFormatter to fix up whitespace
* Clarify review dismissal restriction behaviour in code comments
