Display not only the description, but also browser info and Baseline status for CSS property values

[FluorescentHallucinogen]

Currently, browsers info and Baseline status is displayed only for CSS properties themselves, but not for their values.

Different values for the same CSS property may have different browsers support. This info is already in the @vscode/web-custom-data/data/browsers.css-data.json file, but is not exposed in the VSCode UI now.

And also currently hovering over the value of a CSS property displays documentation for the property itself, not for the value.

[FluorescentHallucinogen]

@aeschli PTAL.