add power-on icon (#185)

* add power-on icon

* v2 design for power-on icon

* Rename power-on.svg to plug-zap.svg

Co-authored-by: Eric Fennis <eric.fennis@gmail.com>

icons/plug-zap.svg

@@ -0,0 +1,18 @@
+<svg
+  xmlns="http://www.w3.org/2000/svg"
+  width="24"
+  height="24"
+  viewBox="0 0 24 24"
+  fill="none"
+  stroke="currentColor"
+  stroke-width="2"
+  stroke-linecap="round"
+  stroke-linejoin="round"
+>
+  <path d="M13 2l-2 2.5h3L12 7" />
+  <path d="M12 22v-3" />
+  <path d="M10 13v-2.5" />
+  <path d="M10 12.5v-2" />
+  <path d="M14 12.5v-2" />
+  <path d="M16 15a2 2 0 00-2-2h-4a2 2 0 00-2 2v2a2 2 0 002 2h4a2 2 0 002-2v-2z" />
+</svg>