LibWeb: Support transforms, stroking, gradients, etc for SVG <text>

This makes use of the new Gfx::Path::text() to handle SVG text elements,
with this text is just a regular path, and can be manipulated like any
other graphics element.

This removes the SVGTextPaintable and makes both <text> and geometry
elements use a new (shared) SVGPathPaintable. This is identical to the
old SVGGeometryPaintable. This simplifies painting as once something is
resolved to a Gfx::Path, the painting logic is the same.

Userland/Libraries/LibWeb/CMakeLists.txt

@@ -491,11 +491,10 @@ set(SOURCES
     Painting/ProgressPaintable.cpp
     Painting/RadioButtonPaintable.cpp
     Painting/RecordingPainter.cpp
-    Painting/SVGGeometryPaintable.cpp
+    Painting/SVGPathPaintable.cpp
     Painting/SVGGraphicsPaintable.cpp
     Painting/SVGPaintable.cpp
     Painting/SVGSVGPaintable.cpp
-    Painting/SVGTextPaintable.cpp
     Painting/ShadowPainting.cpp
     Painting/StackingContext.cpp
     Painting/TableBordersPainting.cpp