LibWeb: Lay out the fieldset's rendered legend

Author: https://github.com/kostyafarber
Commit: 81f8866606
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/2546
Reviewed-by: https://github.com/tcl3 ✅

Tests/LibWeb/Text/expected/wpt-import/html/rendering/non-replaced-elements/the-fieldset-and-legend-elements/legend.txt

@@ -0,0 +1,66 @@
+Summary
+
+Harness status: OK
+
+Rerun
+
+Found 56 tests
+
+56 Pass
+Details
+Result	Test Name	MessagePass	in-body: display	
+Pass	in-body: unicodeBidi	
+Pass	in-body: marginTop	
+Pass	in-body: marginRight	
+Pass	in-body: marginBottom	
+Pass	in-body: marginLeft	
+Pass	in-body: paddingTop	
+Pass	in-body: paddingRight	
+Pass	in-body: paddingBottom	
+Pass	in-body: paddingLeft	
+Pass	in-body: overflow	
+Pass	in-body: height	
+Pass	in-body: box-sizing	
+Pass	in-body: width	
+Pass	rendered-legend: display	
+Pass	rendered-legend: unicodeBidi	
+Pass	rendered-legend: marginTop	
+Pass	rendered-legend: marginRight	
+Pass	rendered-legend: marginBottom	
+Pass	rendered-legend: marginLeft	
+Pass	rendered-legend: paddingTop	
+Pass	rendered-legend: paddingRight	
+Pass	rendered-legend: paddingBottom	
+Pass	rendered-legend: paddingLeft	
+Pass	rendered-legend: overflow	
+Pass	rendered-legend: height	
+Pass	rendered-legend: box-sizing	
+Pass	rendered-legend: width	
+Pass	in-fieldset-second-child: display	
+Pass	in-fieldset-second-child: unicodeBidi	
+Pass	in-fieldset-second-child: marginTop	
+Pass	in-fieldset-second-child: marginRight	
+Pass	in-fieldset-second-child: marginBottom	
+Pass	in-fieldset-second-child: marginLeft	
+Pass	in-fieldset-second-child: paddingTop	
+Pass	in-fieldset-second-child: paddingRight	
+Pass	in-fieldset-second-child: paddingBottom	
+Pass	in-fieldset-second-child: paddingLeft	
+Pass	in-fieldset-second-child: overflow	
+Pass	in-fieldset-second-child: height	
+Pass	in-fieldset-second-child: box-sizing	
+Pass	in-fieldset-second-child: width	
+Pass	in-fieldset-descendant: display	
+Pass	in-fieldset-descendant: unicodeBidi	
+Pass	in-fieldset-descendant: marginTop	
+Pass	in-fieldset-descendant: marginRight	
+Pass	in-fieldset-descendant: marginBottom	
+Pass	in-fieldset-descendant: marginLeft	
+Pass	in-fieldset-descendant: paddingTop	
+Pass	in-fieldset-descendant: paddingRight	
+Pass	in-fieldset-descendant: paddingBottom	
+Pass	in-fieldset-descendant: paddingLeft	
+Pass	in-fieldset-descendant: overflow	
+Pass	in-fieldset-descendant: height	
+Pass	in-fieldset-descendant: box-sizing	
+Pass	in-fieldset-descendant: width