Implement `direction` property (#906)
1<test name="bevy_issue_10343_flex__content_box_ltr" use-rounding="true">
2 <viewport width="max-content" height="max-content"/>
3 <input>
4 <div display="flex" box-sizing="content-box" direction="ltr" flex-direction="column" justify-content="space-around" width="100px" height="100px">
5 <div display="flex" box-sizing="content-box" direction="ltr">
6 <div display="flex" box-sizing="content-box" direction="ltr" width="200px" height="200px" margin-top="5px" margin-left="5px" margin-bottom="5px" margin-right="5px">
7 <div box-sizing="content-box" direction="ltr"/>
8 </div>
9 </div>
10 </div>
11 </input>
12 <expectations>
13 <node x="0" y="0" width="100" height="100">
14 <node x="0" y="0" width="100" height="210">
15 <node x="5" y="5" width="90" height="200">
16 <node x="0" y="0" width="0" height="200"/>
17 </node>
18 </node>
19 </node>
20 </expectations>
21</test>