Viewport characteristics media features

[Michael Strauß]

JavaFX 25 introduces user-preference media queries, which allows
developers to probe user preferences in stylesheets.

I propose to enhance media queries by adding the following viewport
characteristics media features [0]:
1. width
2. height
3. aspect-ratio (=width/height)
4. orientation (with values "portrait" and "landscape")
5. display-mode (with values "fullscreen" and "standalone")

These additional media features make it easier to create responsive
user interfaces. For example, a stylesheet could have different styles
depending on the window width:

    @media (width <= 500) {
        // ...
    }

    @media (500 < width < 1000) {
        // ...
    }

    @media (width >= 1000) {
        // ...
    }

[0] https://www.w3.org/TR/mediaqueries-5/#mf-viewport-characteristics