Implement `direction` property (#906)
1<test name="padding_center_child__border_box_ltr" use-rounding="true">
2 <viewport width="max-content" height="max-content"/>
3 <input>
4 <div direction="ltr" align-items="center" justify-content="center" width="100px" height="100px" padding-top="10px" padding-left="10px" padding-bottom="20px" padding-right="20px">
5 <div direction="ltr" width="10px" height="10px"/>
6 </div>
7 </input>
8 <expectations>
9 <node x="0" y="0" width="100" height="100">
10 <node x="40" y="40" width="10" height="10"/>
11 </node>
12 </expectations>
13</test>