Add of Qt image, remove of .png images and fix attribute not allowed on svg

public/assets/images/skills/C++.svg

@@ -7,26 +7,12 @@
    width="1822"
    height="2051"
    viewBox="0 0 1822 2051"
-   sodipodi:docname="C++.png"
-   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
-   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
    xmlns:xlink="http://www.w3.org/1999/xlink"
    xmlns="http://www.w3.org/2000/svg"
    xmlns:svg="http://www.w3.org/2000/svg">
   <defs
      id="defs1" />
-  <sodipodi:namedview
-     id="namedview1"
-     pagecolor="#ffffff"
-     bordercolor="#000000"
-     borderopacity="0.25"
-     inkscape:showpageshadow="2"
-     inkscape:pageopacity="0.0"
-     inkscape:pagecheckerboard="0"
-     inkscape:deskcolor="#d1d1d1" />
   <g
-     inkscape:groupmode="layer"
-     inkscape:label="Image"
      id="g1">
     <image
        width="1822"