add smartphone-charging icon (#316)

* add smartphone-charging icon

* change path to rect tag

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

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

icons/smartphone-charging.svg

@@ -0,0 +1,14 @@
+<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"
+>
+  <rect x="5" y="2" width="14" height="20" rx="2" ry="2" />
+  <path d="M12.667 8L10 12h4l-2.667 4" />
+</svg>