- Introduced SwapchainCreateFlags enum to control swapchain creation (NORMAL, STATIC, PROTECTED) in OpenXR composition layers.
- Allows creation of static layers (never change after creation) and protected layers (for DRM-protected content).
- Changed internal logic from enum to bool for simplicity; users now select "protected" or not.
- Added support for protected content in viewport-based layers.
- Refactored naming, documentation, and improved reusability.
- Minor cleanup: removed unused variable and added missing space.
Using 2.2.7.dev217+g10c2abcf.
Had to add `colour` to the ignore list as we used it as an alias/keyword for the
documentation of color-related APIs.
Also ignore recommendations to change `thirdparty` to either `third-party` or
`third party`, which are correct but we use the former fairly consistently.
