Sam Atkins 536fb5a0bc LibWeb/CSS: Implement cascade layers (aka @layer) ...

This is done quite simply for now, there are certainly optimizations
that can and should be made later.

With this we now pass:
- http://wpt.live/css/css-cascade/layer-basic.html
- http://wpt.live/css/css-cascade/layer-important.html
- http://wpt.live/css/css-cascade/layer-statement-copy-crash.html
- http://wpt.live/css/css-cascade/layer-stylesheet-sharing-important.html
- http://wpt.live/css/css-cascade/layer-stylesheet-sharing.html
- http://wpt.live/css/css-cascade/layer-vs-inline-style.html

(cherry picked from commit a50da405e9c350266edfc89e5d27f7acddbee422)

2024-10-20 21:09:21 -04:00

137 KiB

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