Add CSS Houdini

[SebastianZ]

There are several specifications related to CSS Houdini, which should be listed individually in the platform status list, at least the ones that have implementer interest or are already shipping.

• Typed OM
• Paint API
• Properties & Values API
• Layout API
• Animation Worklet API

The list is sorted by implementations/implementation interest. The specs currently not having any implementer interest (nor proper specifications) are the Font Metrics API and the Parser API, but I wanted to mention them here for completeness, nonetheless.

Sebastian

[chrisdavidmills]

Thanks @SebastianZ; yes, I think this makes sense.