feat(sw): implement SW header design system

packages/sw/src/assets/layer-ellipse.svg

@@ -0,0 +1,13 @@
+<svg preserveAspectRatio="none" overflow="visible" style="display: block;" width="14" height="14" viewBox="0 0 14 14" fill="none" xmlns="http://www.w3.org/2000/svg">
+<g id="Ellipse 419">
+<circle cx="7" cy="7" r="6" fill="url(#paint0_radial_0_2958)"/>
+<circle cx="7" cy="7" r="6.5" stroke="black" stroke-opacity="0.5"/>
+</g>
+<defs>
+<radialGradient id="paint0_radial_0_2958" cx="0" cy="0" r="1" gradientUnits="userSpaceOnUse" gradientTransform="translate(7 5.28571) rotate(90) scale(8.14286)">
+<stop stop-color="#FFE6BC"/>
+<stop offset="0.440437" stop-color="#FAB846"/>
+<stop offset="1" stop-color="#D38600"/>
+</radialGradient>
+</defs>
+</svg>